fix: Optimizes OPL using string interpolation (#1041)

## Breaking Changes (New API)
ObjectPropertyList supports the following API:
```cs
list.Add(500000);
list.Add(500001, stringArgument);
list.Add("Some text");
list.Add($"Some text with {argument}");
list.Add(500002, $"{arg1}\t{arg2}");
```

## Notes
1. All API uses that require a formatter like this:
    ```cs
    list.Add(500002, "{0}\t{1}", arg1, arg2);
    ```
    Should be changed to use string interpolation, for example:
    ```cs
    list.Add(500002, $"{arg1}\t{arg2}");
    ```
2. The following paradigm should no longer be used:
    ```cs
    list.Add(1061170, prop.ToString()); // strength requirement ~1_val~
    ```
    The new string interpolation API will avoid having to convert the argument to a string before writing it to the packet. Instead use the following:
    ```cs
    list.Add(1061170, $"{prop}"); // strength requirement ~1_val~
    ```

### Benchmarks
```cs
|                         Method |     Mean |   Error |  StdDev |  Gen 0 | Allocated |
|------------------------------- |---------:|--------:|--------:|-------:|----------:|
|                BenchmarkOldOPL | 241.0 ns | 0.56 ns | 0.47 ns | 0.0105 |      88 B |
| BenchmarkStringInterpolatedOPL | 199.9 ns | 2.44 ns | 2.39 ns |      - |         - |
```

### Changes
- [X] Removes crash in STArray.Return when array is null.
- [X] Fixes NPE in OPL when entity is null. Serial in packet will be 0 when entity is null.
- [X] Fixes NPE in AosAttributes when Parent is null.
- [X] Changes OPL to use string interpolation.
- [X] Introduces `IPropertyList` to allow extending PropertyList for other uses.

Projects/Server/Buffers/RawInterpolatedStringHandler.cs

@@ -78,7 +78,7 @@ public ref struct RawInterpolatedStringHandler
     /// <param name="formattedCount">The number of interpolation expressions in the interpolated string.</param>
     [MethodImpl(MethodImplOptions.AggressiveInlining)] // becomes a constant when inputs are constant
     internal static int GetDefaultLength(int literalLength, int formattedCount) =>
-        Math.Max(MinimumArrayPoolLength, literalLength + (formattedCount * GuessedLengthPerHole));
+        Math.Max(MinimumArrayPoolLength, literalLength + formattedCount * GuessedLengthPerHole);
 
     /// <summary>Clears the handler, returning any rented array to the pool.</summary>
     [MethodImpl(MethodImplOptions.AggressiveInlining)] // used only on a few hot paths

Projects/Server/Buffers/STArrayPool.cs

@@ -78,7 +78,7 @@ public class STArrayPool<T> : ArrayPool<T>
     {
         if (array is null)
         {
-            throw new ArgumentNullException(nameof(array));
+            return;
         }
 
         var bucketIndex = SelectBucketIndex(array.Length);

Projects/Server/Items/Container.cs

@@ -755,7 +755,7 @@ namespace Server.Items
 
         public virtual void SendContentTo(NetState state) => state.SendContainerContent(state.Mobile, this);
 
-        public override void GetProperties(ObjectPropertyList list)
+        public override void GetProperties(IPropertyList list)
         {
             base.GetProperties(list);
 
@@ -767,21 +767,14 @@ namespace Server.Items
                     {
                         list.Add(
                             1073841, // Contents: ~1_COUNT~/~2_MAXCOUNT~ items, ~3_WEIGHT~ stones
-                            "{0}\t{1}\t{2}",
-                            TotalItems,
-                            MaxItems,
-                            TotalWeight
+                            $"{TotalItems}\t{MaxItems}\t{TotalWeight}"
                         );
                     }
                     else
                     {
                         list.Add(
                             1072241, // Contents: ~1_COUNT~/~2_MAXCOUNT~ items, ~3_WEIGHT~/~4_MAXWEIGHT~ stones
-                            "{0}\t{1}\t{2}\t{3}",
-                            TotalItems,
-                            MaxItems,
-                            TotalWeight,
-                            MaxWeight
+                            $"{TotalItems}\t{MaxItems}\t{TotalWeight}\t{MaxWeight}"
                         );
                     }
 
@@ -790,7 +783,7 @@ namespace Server.Items
                 else
                 {
                     // ~1_COUNT~ items, ~2_WEIGHT~ stones
-                    list.Add(1050044, "{0}\t{1}", TotalItems, TotalWeight);
+                    list.Add(1050044, $"{TotalItems}\t{TotalWeight}");
                 }
             }
         }

Projects/Server/Items/Item.cs

@@ -176,7 +176,7 @@ namespace Server
         Spawner = 0x100
     }
 
-    public class Item : IHued, IComparable<Item>, ISpawnable, IPropertyListObject
+    public class Item : IHued, IComparable<Item>, ISpawnable, IObjectPropertyListEntity
     {
         private static readonly ILogger logger = LogFactory.GetLogger(typeof(Item));
 
@@ -769,7 +769,7 @@ namespace Server
         ///     custom
         ///     properties.
         /// </summary>
-        public virtual void GetProperties(ObjectPropertyList list)
+        public virtual void GetProperties(IPropertyList list)
         {
             AddNameProperties(list);
         }
@@ -1817,7 +1817,7 @@ namespace Server
         ///     Overridable. Adds the name of this item to the given <see cref="ObjectPropertyList" />. This method should be overridden
         ///     if the item requires a complex naming format.
         /// </summary>
-        public virtual void AddNameProperty(ObjectPropertyList list)
+        public virtual void AddNameProperty(IPropertyList list)
         {
             var name = Name;
 
@@ -1829,7 +1829,7 @@ namespace Server
                 }
                 else
                 {
-                    list.Add(1050039, "{0}\t#{1}", m_Amount, LabelNumber); // ~1_NUMBER~ ~2_ITEMNAME~
+                    list.Add(1050039, $"{m_Amount}\t#{LabelNumber}"); // ~1_NUMBER~ ~2_ITEMNAME~
                 }
             }
             else
@@ -1840,7 +1840,7 @@ namespace Server
                 }
                 else
                 {
-                    list.Add(1050039, "{0}\t{1}", m_Amount, Name); // ~1_NUMBER~ ~2_ITEMNAME~
+                    list.Add(1050039, $"{m_Amount}\t{Name}"); // ~1_NUMBER~ ~2_ITEMNAME~
                 }
             }
         }
@@ -1849,7 +1849,7 @@ namespace Server
         ///     Overridable. Adds the loot type of this item to the given <see cref="ObjectPropertyList" />. By default, this will be
         ///     either 'blessed', 'cursed', or 'insured'.
         /// </summary>
-        public virtual void AddLootTypeProperty(ObjectPropertyList list)
+        public virtual void AddLootTypeProperty(IPropertyList list)
         {
             if (m_LootType == LootType.Blessed)
             {
@@ -1868,59 +1868,51 @@ namespace Server
         /// <summary>
         ///     Overridable. Adds any elemental resistances of this item to the given <see cref="ObjectPropertyList" />.
         /// </summary>
-        public virtual void AddResistanceProperties(ObjectPropertyList list)
+        public virtual void AddResistanceProperties(IPropertyList list)
         {
             var v = PhysicalResistance;
 
             if (v != 0)
             {
-                list.Add(1060448, v.ToString()); // physical resist ~1_val~%
+                list.Add(1060448, $"{v}"); // physical resist ~1_val~%
             }
 
             v = FireResistance;
 
             if (v != 0)
             {
-                list.Add(1060447, v.ToString()); // fire resist ~1_val~%
+                list.Add(1060447, $"{v}"); // fire resist ~1_val~%
             }
 
             v = ColdResistance;
 
             if (v != 0)
             {
-                list.Add(1060445, v.ToString()); // cold resist ~1_val~%
+                list.Add(1060445, $"{v}"); // cold resist ~1_val~%
             }
 
             v = PoisonResistance;
 
             if (v != 0)
             {
-                list.Add(1060449, v.ToString()); // poison resist ~1_val~%
+                list.Add(1060449, $"{v}"); // poison resist ~1_val~%
             }
 
             v = EnergyResistance;
 
             if (v != 0)
             {
-                list.Add(1060446, v.ToString()); // energy resist ~1_val~%
+                list.Add(1060446, $"{v}"); // energy resist ~1_val~%
             }
         }
 
         /// <summary>
         ///     Overridable. Displays cliloc 1072788-1072789.
         /// </summary>
-        public virtual void AddWeightProperty(ObjectPropertyList list)
+        public virtual void AddWeightProperty(IPropertyList list)
         {
             var weight = PileWeight + TotalWeight;
-
-            if (weight == 1)
-            {
-                list.Add(1072788, weight.ToString()); // Weight: ~1_WEIGHT~ stone
-            }
-            else
-            {
-                list.Add(1072789, weight.ToString()); // Weight: ~1_WEIGHT~ stones
-            }
+            list.Add(weight == 1 ? 1072788 : 1072789, $"{weight}");
         }
 
         /// <summary>
@@ -1928,7 +1920,7 @@ namespace Server
         ///     <see cref="AddBlessedForProperty" /> (if applicable), and <see cref="AddLootTypeProperty" /> (if
         ///     <see cref="DisplayLootType" />).
         /// </summary>
-        public virtual void AddNameProperties(ObjectPropertyList list)
+        public virtual void AddNameProperties(IPropertyList list)
         {
             AddNameProperty(list);
 
@@ -1969,7 +1961,7 @@ namespace Server
         /// <summary>
         ///     Overridable. Adds the "Quest Item" property to the given <see cref="ObjectPropertyList" />.
         /// </summary>
-        public virtual void AddQuestItemProperty(ObjectPropertyList list)
+        public virtual void AddQuestItemProperty(IPropertyList list)
         {
             list.Add(1072351); // Quest Item
         }
@@ -1977,7 +1969,7 @@ namespace Server
         /// <summary>
         ///     Overridable. Adds the "Locked Down & Secure" property to the given <see cref="ObjectPropertyList" />.
         /// </summary>
-        public virtual void AddSecureProperty(ObjectPropertyList list)
+        public virtual void AddSecureProperty(IPropertyList list)
         {
             list.Add(501644); // locked down & secure
         }
@@ -1985,7 +1977,7 @@ namespace Server
         /// <summary>
         ///     Overridable. Adds the "Locked Down" property to the given <see cref="ObjectPropertyList" />.
         /// </summary>
-        public virtual void AddLockedDownProperty(ObjectPropertyList list)
+        public virtual void AddLockedDownProperty(IPropertyList list)
         {
             list.Add(501643); // locked down
         }
@@ -1993,9 +1985,9 @@ namespace Server
         /// <summary>
         ///     Overridable. Adds the "Blessed for ~1_NAME~" property to the given <see cref="ObjectPropertyList" />.
         /// </summary>
-        public virtual void AddBlessedForProperty(ObjectPropertyList list, Mobile m)
+        public virtual void AddBlessedForProperty(IPropertyList list, Mobile m)
         {
-            list.Add(1062203, "{0}", m.Name); // Blessed for ~1_NAME~
+            list.Add(1062203, m.Name); // Blessed for ~1_NAME~
         }
 
         /// <summary>
@@ -2003,7 +1995,7 @@ namespace Server
         ///     Recursively calls <see cref="Item.GetChildProperties">Item.GetChildProperties</see> or
         ///     <see cref="Mobile.GetChildProperties">Mobile.GetChildProperties</see>.
         /// </summary>
-        public virtual void GetChildProperties(ObjectPropertyList list, Item item)
+        public virtual void GetChildProperties(IPropertyList list, Item item)
         {
             if (m_Parent is Item parentItem)
             {
@@ -2021,7 +2013,7 @@ namespace Server
         ///     . Recursively calls <see cref="Item.GetChildProperties">Item.GetChildNameProperties</see> or
         ///     <see cref="Mobile.GetChildProperties">Mobile.GetChildNameProperties</see>.
         /// </summary>
-        public virtual void GetChildNameProperties(ObjectPropertyList list, Item item)
+        public virtual void GetChildNameProperties(IPropertyList list, Item item)
         {
             if (m_Parent is Item parentItem)
             {
@@ -2377,7 +2369,7 @@ namespace Server
             return bounds;
         }
 
-        public virtual void AppendChildProperties(ObjectPropertyList list)
+        public virtual void AppendChildProperties(IPropertyList list)
         {
             if (m_Parent is Item item)
             {
@@ -2389,7 +2381,7 @@ namespace Server
             }
         }
 
-        public virtual void AppendChildNameProperties(ObjectPropertyList list)
+        public virtual void AppendChildNameProperties(IPropertyList list)
         {
             if (m_Parent is Item item)
             {

Projects/Server/Items/VirtualCheck.cs

@@ -120,7 +120,7 @@ namespace Server.Items
             LabelTo(from, "Offer: {0:#,0} platinum, {1:#,0} gold", Plat, Gold);
         }
 
-        public override void GetProperties(ObjectPropertyList list)
+        public override void GetProperties(IPropertyList list)
         {
             base.GetProperties(list);
 

Projects/Server/Mobiles/Mobile.cs

@@ -403,7 +403,7 @@ namespace Server
     /// <summary>
     ///     Base class representing players, npcs, and creatures.
     /// </summary>
-    public class Mobile : IHued, IComparable<Mobile>, ISpawnable, IPropertyListObject
+    public class Mobile : IHued, IComparable<Mobile>, ISpawnable, IObjectPropertyListEntity
     {
         // Allow four warmode changes in 0.5 seconds, any more will be delay for two seconds
         private const int WarmodeCatchCount = 4;
@@ -2476,7 +2476,7 @@ namespace Server
         public virtual int HuedItemID => m_Female ? 0x2107 : 0x2106;
         public ObjectPropertyList PropertyList => m_PropertyList ??= InitializePropertyList(new ObjectPropertyList(this));
 
-        public virtual void GetProperties(ObjectPropertyList list)
+        public virtual void GetProperties(IPropertyList list)
         {
             AddNameProperties(list);
         }
@@ -3445,57 +3445,51 @@ namespace Server
 
         public virtual string ApplyNameSuffix(string suffix) => suffix;
 
-        public virtual void AddNameProperties(ObjectPropertyList list)
+        public virtual void AddNameProperties(IPropertyList list)
         {
-            var name = Name ?? "";
+            var name = Name ?? " ";
 
             string prefix;
 
             if (ShowFameTitle && (m_Player || m_Body.IsHuman) && m_Fame >= 10000)
             {
-                prefix = m_Female ? "Lady" : "Lord";
+                prefix = m_Female ? "Lady " : "Lord ";
             }
             else
             {
-                prefix = "";
+                prefix = " ";
             }
 
-            var suffix = "";
-
-            if (PropertyTitle && !string.IsNullOrEmpty(Title))
-            {
-                suffix = Title;
-            }
+            var title = PropertyTitle && !string.IsNullOrEmpty(Title) ? Title : "";
 
+            string suffix;
             var guild = m_Guild;
-
             if (guild != null && (m_Player || m_DisplayGuildTitle))
             {
-                suffix = suffix.Length > 0
-                    ? $"{suffix} [{Utility.FixHtml(guild.Abbreviation)}]"
+                suffix = title.Length > 0
+                    ? $"{title} [{Utility.FixHtml(guild.Abbreviation)}]"
                     : $"[{Utility.FixHtml(guild.Abbreviation)}]";
             }
+            else
+            {
+                suffix = " ";
+            }
 
-            suffix = ApplyNameSuffix(suffix);
-
-            list.Add(1050045, "{0} \t{1}\t {2}", prefix, name, suffix); // ~1_PREFIX~~2_NAME~~3_SUFFIX~
+            list.Add(1050045, $"{prefix}\t{name}\t{ApplyNameSuffix(suffix)}"); // ~1_PREFIX~~2_NAME~~3_SUFFIX~
 
             if (guild != null && (m_DisplayGuildTitle || m_Player && guild.Type != GuildType.Regular))
             {
                 var type = guild.Type >= 0 && (int)guild.Type < m_GuildTypes.Length ? m_GuildTypes[(int)guild.Type] : "";
 
-                var title = GuildTitle?.Trim() ?? "";
+                var guildTitle = GuildTitle?.Trim() ?? "";
 
-                if (title.Length > 0)
+                if (guildTitle.Length > 0)
                 {
-                    if (NewGuildDisplay)
-                    {
-                        list.Add("{0}, {1}", Utility.FixHtml(title), Utility.FixHtml(guild.Name));
-                    }
-                    else
-                    {
-                        list.Add("{0}, {1} Guild{2}", Utility.FixHtml(title), Utility.FixHtml(guild.Name), type);
-                    }
+                    list.Add(
+                        NewGuildDisplay
+                            ? $"{Utility.FixHtml(guildTitle)}, {Utility.FixHtml(guild.Name)}"
+                            : $"{Utility.FixHtml(guildTitle)}, {Utility.FixHtml(guild.Name)} Guild{type}"
+                    );
                 }
                 else
                 {
@@ -3504,11 +3498,11 @@ namespace Server
             }
         }
 
-        public virtual void GetChildProperties(ObjectPropertyList list, Item item)
+        public virtual void GetChildProperties(IPropertyList list, Item item)
         {
         }
 
-        public virtual void GetChildNameProperties(ObjectPropertyList list, Item item)
+        public virtual void GetChildNameProperties(IPropertyList list, Item item)
         {
         }
 

Projects/Server/Network/Packets/OutgoingEntityPackets.cs

@@ -41,7 +41,7 @@ public static class OutgoingEntityPackets
         writer.Write(hash);
     }
 
-    public static void SendOPLInfo(this NetState ns, IPropertyListObject obj) =>
+    public static void SendOPLInfo(this NetState ns, IObjectPropertyListEntity obj) =>
         ns.SendOPLInfo(obj.Serial, obj.PropertyList.Hash);
 
     public static void SendOPLInfo(this NetState ns, Serial serial, int hash)

Projects/Server/ObjectPropertyList.cs

@@ -1,184 +0,0 @@
-using System;
-using System.Buffers;
-using System.IO;
-using System.Runtime.CompilerServices;
-using Server.Network;
-
-namespace Server
-{
-    public interface IPropertyListObject : IEntity
-    {
-        ObjectPropertyList PropertyList { get; }
-
-        void GetProperties(ObjectPropertyList list);
-    }
-
-    public sealed class ObjectPropertyList
-    {
-        // Each of these are localized to "~1_NOTHING~" which allows the string argument to be used
-        private static readonly int[] m_StringNumbers =
-        {
-            1042971,
-            1070722
-        };
-
-        private int _hash;
-        private int _strings;
-        private byte[] _buffer;
-        private int _position;
-
-        public ObjectPropertyList(IEntity e)
-        {
-            Entity = e;
-            _buffer = GC.AllocateUninitializedArray<byte>(64);
-
-            var writer = new SpanWriter(_buffer);
-            writer.Write((byte)0xD6); // Packet ID
-            writer.Seek(2, SeekOrigin.Current);
-            writer.Write((ushort)1);
-            writer.Write(e.Serial);
-            writer.Write((ushort)0);
-            _position = writer.Position + 4; // Hash
-        }
-
-        public IEntity Entity { get; }
-
-        public int Hash => 0x40000000 + _hash;
-
-        public int Header { get; set; }
-
-        public string HeaderArgs { get; set; }
-
-        public static bool Enabled { get; set; }
-
-        public byte[] Buffer => _buffer;
-
-        public void Reset()
-        {
-            _position = 15;
-            _hash = 0;
-            _strings = 0;
-            Header = 0;
-            HeaderArgs = null;
-        }
-
-        public void Flush()
-        {
-            Resize(_buffer.Length * 2);
-        }
-
-        [MethodImpl(MethodImplOptions.AggressiveInlining)]
-        private void Resize(int amount)
-        {
-            var newBuffer = GC.AllocateUninitializedArray<byte>(amount);
-            _buffer.AsSpan(0, Math.Min(amount, _buffer.Length)).CopyTo(newBuffer);
-            _buffer = newBuffer;
-        }
-
-        public void Terminate()
-        {
-            int length = _position + 4;
-            if (length != _buffer.Length)
-            {
-                Resize(length);
-            }
-
-            var writer = new SpanWriter(_buffer);
-            writer.Seek(_position, SeekOrigin.Begin);
-            writer.Write(0);
-
-            writer.Seek(11, SeekOrigin.Begin);
-            writer.Write(_hash);
-            writer.WritePacketLength();
-        }
-
-        public void AddHash(int val)
-        {
-            _hash ^= val & 0x3FFFFFF;
-            _hash ^= (val >> 26) & 0x3F;
-        }
-
-        public void Add(int number, string arguments = null)
-        {
-            if (number == 0)
-            {
-                return;
-            }
-
-            arguments ??= "";
-
-            if (Header == 0)
-            {
-                Header = number;
-                HeaderArgs = arguments;
-            }
-
-            AddHash(number);
-            if (arguments.Length > 0)
-            {
-                AddHash(arguments.GetHashCode(StringComparison.Ordinal));
-            }
-
-            int strLength = arguments.Length * 2;
-            int length = _position + 6 + strLength;
-            while (length > _buffer.Length)
-            {
-                Flush();
-            }
-
-            var writer = new SpanWriter(_buffer.AsSpan(_position));
-            writer.Write(number);
-            writer.Write((ushort)strLength);
-            writer.WriteLittleUni(arguments);
-
-            _position += writer.BytesWritten;
-        }
-
-        public void Add(int number, string format, object arg0)
-        {
-            Add(number, string.Format(format, arg0));
-        }
-
-        public void Add(int number, string format, object arg0, object arg1)
-        {
-            Add(number, string.Format(format, arg0, arg1));
-        }
-
-        public void Add(int number, string format, object arg0, object arg1, object arg2)
-        {
-            Add(number, string.Format(format, arg0, arg1, arg2));
-        }
-
-        public void Add(int number, string format, params object[] args)
-        {
-            Add(number, string.Format(format, args));
-        }
-
-        private int GetStringNumber() => m_StringNumbers[_strings++ % m_StringNumbers.Length];
-
-        public void Add(string text)
-        {
-            Add(GetStringNumber(), text);
-        }
-
-        public void Add(string format, string arg0)
-        {
-            Add(GetStringNumber(), string.Format(format, arg0));
-        }
-
-        public void Add(string format, string arg0, string arg1)
-        {
-            Add(GetStringNumber(), string.Format(format, arg0, arg1));
-        }
-
-        public void Add(string format, string arg0, string arg1, string arg2)
-        {
-            Add(GetStringNumber(), string.Format(format, arg0, arg1, arg2));
-        }
-
-        public void Add(string format, params object[] args)
-        {
-            Add(GetStringNumber(), string.Format(format, args));
-        }
-    }
-}

Projects/Server/PropertyList/IObjectPropertyListEntity.cs

@@ -0,0 +1,23 @@
+/*************************************************************************
+ * ModernUO                                                              *
+ * Copyright 2019-2022 - ModernUO Development Team                       *
+ * Email: hi@modernuo.com                                                *
+ * File: IObjectPropertyListEntity.cs                                    *
+ *                                                                       *
+ * This program is free software: you can redistribute it and/or modify  *
+ * it under the terms of the GNU General Public License as published by  *
+ * the Free Software Foundation, either version 3 of the License, or     *
+ * (at your option) any later version.                                   *
+ *                                                                       *
+ * You should have received a copy of the GNU General Public License     *
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>. *
+ *************************************************************************/
+
+namespace Server;
+
+public interface IObjectPropertyListEntity : IEntity
+{
+    ObjectPropertyList PropertyList { get; }
+
+    void GetProperties(IPropertyList list);
+}

Projects/Server/PropertyList/IPropertyList.cs

@@ -0,0 +1,30 @@
+/*************************************************************************
+ * ModernUO                                                              *
+ * Copyright 2019-2022 - ModernUO Development Team                       *
+ * Email: hi@modernuo.com                                                *
+ * File: IPropertyList.cs                                                *
+ *                                                                       *
+ * This program is free software: you can redistribute it and/or modify  *
+ * it under the terms of the GNU General Public License as published by  *
+ * the Free Software Foundation, either version 3 of the License, or     *
+ * (at your option) any later version.                                   *
+ *                                                                       *
+ * You should have received a copy of the GNU General Public License     *
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>. *
+ *************************************************************************/
+
+using System.Runtime.CompilerServices;
+using Server.Text;
+
+namespace Server;
+
+public interface IPropertyList : ISelfInterpolatedStringHandler
+{
+    public void Reset();
+    public void Terminate();
+    public void Add(int number, string argument = null);
+    public void Add(string text);
+
+    // String Interpolation
+    public void Add(int number, [InterpolatedStringHandlerArgument("")] ref InterpolatedStringHandler handler);
+}

Projects/Server/PropertyList/ObjectPropertyList.cs

@@ -0,0 +1,508 @@
+/*************************************************************************
+ * ModernUO                                                              *
+ * Copyright 2019-2022 - ModernUO Development Team                       *
+ * Email: hi@modernuo.com                                                *
+ * File: ObjectPropertyList.cs                                           *
+ *                                                                       *
+ * This program is free software: you can redistribute it and/or modify  *
+ * it under the terms of the GNU General Public License as published by  *
+ * the Free Software Foundation, either version 3 of the License, or     *
+ * (at your option) any later version.                                   *
+ *                                                                       *
+ * You should have received a copy of the GNU General Public License     *
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>. *
+ *************************************************************************/
+
+#nullable enable
+using System;
+using System.Buffers;
+using System.Diagnostics;
+using System.IO;
+using System.Runtime.CompilerServices;
+using Server.Buffers;
+using Server.Network;
+using Server.Text;
+
+namespace Server;
+
+public sealed class ObjectPropertyList : IPropertyList, IDisposable
+{
+    // Each of these are localized to "~1_NOTHING~" which allows the string argument to be used
+    private static readonly int[] _stringNumbers =
+    {
+        1042971,
+        1070722,
+        1114057, // ~1_val~
+        1114778, // ~1_val~
+        1114779 // ~1_val~
+    };
+
+    private int _hash;
+    private int _stringNumbersIndex;
+    private byte[] _buffer;
+    private int _bufferPos;
+
+    // For string interpolation
+    private int _pos;
+    private char[]? _arrayToReturnToPool;
+
+    public ObjectPropertyList(IEntity? e)
+    {
+        Entity = e;
+        _buffer = GC.AllocateUninitializedArray<byte>(64);
+
+        var writer = new SpanWriter(_buffer);
+        writer.Write((byte)0xD6); // Packet ID
+        writer.Seek(2, SeekOrigin.Current);
+        writer.Write((ushort)1);
+        writer.Write(e?.Serial ?? Serial.Zero);
+        writer.Write((ushort)0);
+        _bufferPos = writer.Position + 4; // Hash
+    }
+
+    public IEntity? Entity { get; }
+
+    public int Hash => 0x40000000 + _hash;
+
+    public int Header { get; set; }
+
+    public string HeaderArgs { get; set; }
+
+    public static bool Enabled { get; set; }
+
+    public byte[] Buffer => _buffer;
+
+    public void Reset()
+    {
+        _bufferPos = 15;
+        _hash = 0;
+        _stringNumbersIndex = 0;
+        Header = 0;
+        HeaderArgs = null;
+        STArrayPool<char>.Shared.Return(_arrayToReturnToPool);
+        _pos = 0;
+    }
+
+    private void Flush()
+    {
+        Resize(_buffer.Length * 2);
+    }
+
+    [MethodImpl(MethodImplOptions.AggressiveInlining)]
+    private void Resize(int amount)
+    {
+        var newBuffer = GC.AllocateUninitializedArray<byte>(amount);
+        _buffer.AsSpan(0, Math.Min(amount, _buffer.Length)).CopyTo(newBuffer);
+        _buffer = newBuffer;
+    }
+
+    public void Terminate()
+    {
+        int length = _bufferPos + 4;
+        if (length != _buffer.Length)
+        {
+            Resize(length);
+        }
+
+        var writer = new SpanWriter(_buffer);
+        writer.Seek(_bufferPos, SeekOrigin.Begin);
+        writer.Write(0);
+
+        writer.Seek(11, SeekOrigin.Begin);
+        writer.Write(_hash);
+        writer.WritePacketLength();
+    }
+
+    private void AddHash(int val)
+    {
+        _hash ^= val & 0x3FFFFFF;
+        _hash ^= (val >> 26) & 0x3F;
+    }
+
+    public void Add(int number, string? arguments = null)
+    {
+        if (number == 0)
+        {
+            return;
+        }
+
+        arguments ??= "";
+
+        if (Header == 0)
+        {
+            Header = number;
+            HeaderArgs = arguments;
+        }
+
+        AddHash(number);
+        if (arguments.Length > 0)
+        {
+            AddHash(arguments.GetHashCode(StringComparison.Ordinal));
+        }
+
+        int strLength = arguments.Length * 2;
+        int length = _bufferPos + 6 + strLength;
+        while (length > _buffer.Length)
+        {
+            Flush();
+        }
+
+        var writer = new SpanWriter(_buffer.AsSpan(_bufferPos));
+        writer.Write(number);
+        writer.Write((ushort)strLength);
+        writer.WriteLittleUni(arguments);
+
+        _bufferPos += writer.BytesWritten;
+        _pos = 0;
+    }
+
+    private int GetStringNumber() => _stringNumbers[_stringNumbersIndex++ % _stringNumbers.Length];
+
+    public void Add(string argument) => Add(GetStringNumber(), argument);
+
+    public void Add(
+        [InterpolatedStringHandlerArgument("")]
+        ref IPropertyList.InterpolatedStringHandler handler
+    ) => Add(GetStringNumber(), ref handler);
+
+    // String Interpolation
+    public void Add(
+        int number,
+        [InterpolatedStringHandlerArgument("")]
+        ref IPropertyList.InterpolatedStringHandler handler)
+    {
+        if (number == 0)
+        {
+            return;
+        }
+
+        var chars = _arrayToReturnToPool.AsSpan(0, _pos);
+
+        if (Header == 0)
+        {
+            Header = number;
+            HeaderArgs = chars.ToString();
+            HeaderArgs.GetHashCode(StringComparison.Ordinal);
+        }
+
+        AddHash(number);
+        if (chars.Length > 0)
+        {
+            AddHash(string.GetHashCode(chars, StringComparison.Ordinal));
+        }
+
+        int strLength = chars.Length * 2;
+        int length = _bufferPos + 6 + strLength;
+        while (length > _buffer.Length)
+        {
+            Flush();
+        }
+
+        var writer = new SpanWriter(_buffer.AsSpan(_bufferPos));
+        writer.Write(number);
+        writer.Write((ushort)strLength);
+        writer.Write(chars, TextEncoding.UnicodeLE);
+
+        _bufferPos += writer.BytesWritten;
+    }
+
+    public void InitializeInterpolation(int literalLength, int formattedCount)
+    {
+        _arrayToReturnToPool ??= STArrayPool<char>.Shared.Rent(GetDefaultLength(literalLength, formattedCount));
+        _pos = 0;
+    }
+
+    // Copied from RawInterpolatedStringHandler
+
+    [MethodImpl(MethodImplOptions.AggressiveInlining)]
+    private static int GetDefaultLength(int literalLength, int formattedCount) =>
+        Math.Max(256, literalLength + formattedCount * 11);
+
+    public void AppendLiteral(string value)
+    {
+        if (value.Length == 1)
+        {
+            Span<char> chars = _arrayToReturnToPool.AsSpan();
+            int pos = _pos;
+            if ((uint)pos < (uint)chars.Length)
+            {
+                chars[pos] = value[0];
+                _pos = pos + 1;
+            }
+            else
+            {
+                GrowThenCopyString(value);
+            }
+            return;
+        }
+
+        AppendStringDirect(value);
+    }
+
+    private void AppendStringDirect(string value)
+    {
+        if (value.TryCopyTo(_arrayToReturnToPool.AsSpan(_pos..)))
+        {
+            _pos += value.Length;
+        }
+        else
+        {
+            GrowThenCopyString(value);
+        }
+    }
+
+    public void AppendFormatted<T>(T value)
+    {
+
+        string? s;
+        if (value is IFormattable)
+        {
+            if (value is ISpanFormattable)
+            {
+                int charsWritten;
+                while (!((ISpanFormattable)value).TryFormat(_arrayToReturnToPool.AsSpan(_pos..), out charsWritten, default, null))
+                {
+                    Grow();
+                }
+
+                _pos += charsWritten;
+                return;
+            }
+
+            s = ((IFormattable)value).ToString(format: null, null);
+        }
+        else
+        {
+            s = value?.ToString();
+        }
+
+        if (s is not null)
+        {
+            AppendStringDirect(s);
+        }
+    }
+
+    public void AppendFormatted<T>(T value, string? format)
+    {
+        string? s;
+        if (value is IFormattable)
+        {
+            if (value is ISpanFormattable)
+            {
+                int charsWritten;
+                while (!((ISpanFormattable)value).TryFormat(_arrayToReturnToPool.AsSpan(_pos..), out charsWritten, format, null))
+                {
+                    Grow();
+                }
+
+                _pos += charsWritten;
+                return;
+            }
+
+            s = ((IFormattable)value).ToString(format, null);
+        }
+        else
+        {
+            s = value?.ToString();
+        }
+
+        if (s is not null)
+        {
+            AppendStringDirect(s);
+        }
+    }
+
+    public void AppendFormatted<T>(T value, int alignment)
+    {
+        int startingPos = _pos;
+        AppendFormatted(value);
+        if (alignment != 0)
+        {
+            AppendOrInsertAlignmentIfNeeded(startingPos, alignment);
+        }
+    }
+
+    public void AppendFormatted<T>(T value, int alignment, string? format)
+    {
+        int startingPos = _pos;
+        AppendFormatted(value, format);
+        if (alignment != 0)
+        {
+            AppendOrInsertAlignmentIfNeeded(startingPos, alignment);
+        }
+    }
+
+    public void AppendFormatted(ReadOnlySpan<char> value)
+    {
+        if (value.TryCopyTo(_arrayToReturnToPool.AsSpan(_pos..)))
+        {
+            _pos += value.Length;
+        }
+        else
+        {
+            GrowThenCopySpan(value);
+        }
+    }
+
+    public void AppendFormatted(ReadOnlySpan<char> value, int alignment = 0, string? format = null)
+    {
+        bool leftAlign = false;
+        if (alignment < 0)
+        {
+            leftAlign = true;
+            alignment = -alignment;
+        }
+
+        int paddingRequired = alignment - value.Length;
+        if (paddingRequired <= 0)
+        {
+            AppendFormatted(value);
+            return;
+        }
+
+        EnsureCapacityForAdditionalChars(value.Length + paddingRequired);
+        var chars = _arrayToReturnToPool.AsSpan();
+        if (leftAlign)
+        {
+            value.CopyTo(chars[_pos..]);
+            _pos += value.Length;
+            chars.Slice(_pos, paddingRequired).Fill(' ');
+            _pos += paddingRequired;
+        }
+        else
+        {
+            chars.Slice(_pos, paddingRequired).Fill(' ');
+            _pos += paddingRequired;
+            value.CopyTo(chars[_pos..]);
+            _pos += value.Length;
+        }
+    }
+
+    public void AppendFormatted(string? value)
+    {
+        if (value?.TryCopyTo(_arrayToReturnToPool.AsSpan(_pos..)) == true)
+        {
+            _pos += value.Length;
+        }
+        else
+        {
+            AppendFormattedSlow(value);
+        }
+    }
+
+    [MethodImpl(MethodImplOptions.NoInlining)]
+    private void AppendFormattedSlow(string? value)
+    {
+        if (value is not null)
+        {
+            EnsureCapacityForAdditionalChars(value.Length);
+            value.CopyTo(_arrayToReturnToPool.AsSpan(_pos..));
+            _pos += value.Length;
+        }
+    }
+
+    public void AppendFormatted(string? value, int alignment = 0, string? format = null) =>
+        AppendFormatted<string?>(value, alignment, format);
+
+    public void AppendFormatted(object? value, int alignment = 0, string? format = null) =>
+        AppendFormatted<object?>(value, alignment, format);
+
+    private void AppendOrInsertAlignmentIfNeeded(int startingPos, int alignment)
+    {
+        Debug.Assert(startingPos >= 0 && startingPos <= _pos);
+        Debug.Assert(alignment != 0);
+
+        int charsWritten = _pos - startingPos;
+
+        bool leftAlign = false;
+        if (alignment < 0)
+        {
+            leftAlign = true;
+            alignment = -alignment;
+        }
+
+        int paddingNeeded = alignment - charsWritten;
+        if (paddingNeeded > 0)
+        {
+            EnsureCapacityForAdditionalChars(paddingNeeded);
+
+            var chars = _arrayToReturnToPool.AsSpan();
+            if (leftAlign)
+            {
+                chars.Slice(_pos, paddingNeeded).Fill(' ');
+            }
+            else
+            {
+                chars.Slice(startingPos, charsWritten).CopyTo(chars[(startingPos + paddingNeeded)..]);
+                chars.Slice(startingPos, paddingNeeded).Fill(' ');
+            }
+
+            _pos += paddingNeeded;
+        }
+    }
+
+    [MethodImpl(MethodImplOptions.AggressiveInlining)]
+    private void EnsureCapacityForAdditionalChars(int additionalChars)
+    {
+        if (_arrayToReturnToPool.Length - _pos < additionalChars)
+        {
+            Grow(additionalChars);
+        }
+    }
+
+    [MethodImpl(MethodImplOptions.NoInlining)]
+    private void GrowThenCopyString(string value)
+    {
+        Grow(value.Length);
+        value.CopyTo(_arrayToReturnToPool.AsSpan(_pos..));
+        _pos += value.Length;
+    }
+
+    [MethodImpl(MethodImplOptions.NoInlining)]
+    private void GrowThenCopySpan(ReadOnlySpan<char> value)
+    {
+        Grow(value.Length);
+        value.CopyTo(_arrayToReturnToPool.AsSpan(_pos..));
+        _pos += value.Length;
+    }
+
+    [MethodImpl(MethodImplOptions.NoInlining)]
+    private void Grow(int additionalChars)
+    {
+        Debug.Assert(additionalChars > _arrayToReturnToPool.Length - _pos);
+        GrowCore((uint)_pos + (uint)additionalChars);
+    }
+
+    [MethodImpl(MethodImplOptions.NoInlining)]
+    private void Grow()
+    {
+        GrowCore((uint)_arrayToReturnToPool.Length + 1);
+    }
+
+    [MethodImpl(MethodImplOptions.AggressiveInlining)]
+    private void GrowCore(uint requiredMinCapacity)
+    {
+        uint newCapacity = Math.Max(requiredMinCapacity, Math.Min((uint)_arrayToReturnToPool.Length * 2, 0x3FFFFFDF));
+        int arraySize = (int)Math.Clamp(newCapacity, 256, int.MaxValue);
+
+        char[] newArray = STArrayPool<char>.Shared.Rent(arraySize);
+        _arrayToReturnToPool.AsSpan(.._pos).CopyTo(newArray);
+
+        char[] toReturn = _arrayToReturnToPool;
+        _arrayToReturnToPool = newArray;
+
+        STArrayPool<char>.Shared.Return(toReturn);
+    }
+
+    public void Dispose()
+    {
+        STArrayPool<char>.Shared.Return(_arrayToReturnToPool);
+        _arrayToReturnToPool = null;
+    }
+
+    ~ObjectPropertyList()
+    {
+        STArrayPool<char>.Shared.Return(_arrayToReturnToPool);
+        _arrayToReturnToPool = null;
+    }
+}

Projects/Server/Text/ISelfInterpolatedStringHandler.cs

@@ -0,0 +1,71 @@
+/*************************************************************************
+ * ModernUO                                                              *
+ * Copyright 2019-2022 - ModernUO Development Team                       *
+ * Email: hi@modernuo.com                                                *
+ * File: ISelfInterpolatedStringHandler.cs                               *
+ *                                                                       *
+ * This program is free software: you can redistribute it and/or modify  *
+ * it under the terms of the GNU General Public License as published by  *
+ * the Free Software Foundation, either version 3 of the License, or     *
+ * (at your option) any later version.                                   *
+ *                                                                       *
+ * You should have received a copy of the GNU General Public License     *
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>. *
+ *************************************************************************/
+
+using System;
+using System.Runtime.CompilerServices;
+
+namespace Server.Text;
+
+public interface ISelfInterpolatedStringHandler
+{
+    public void Add([InterpolatedStringHandlerArgument("")] ref InterpolatedStringHandler handler);
+    public void InitializeInterpolation(int literalLength, int formattedCount);
+    public void AppendLiteral(string value);
+    public void AppendFormatted<T>(T value);
+    public void AppendFormatted<T>(T value, string? format);
+    public void AppendFormatted<T>(T value, int alignment);
+    public void AppendFormatted<T>(T value, int alignment, string? format);
+    public void AppendFormatted(ReadOnlySpan<char> value);
+    public void AppendFormatted(ReadOnlySpan<char> value, int alignment, string? format = null);
+    public void AppendFormatted(object? value, int alignment = 0, string? format = null);
+    public void AppendFormatted(string? value);
+    public void AppendFormatted(string? value, int alignment, string? format = null);
+
+    [InterpolatedStringHandler]
+    public ref struct InterpolatedStringHandler
+    {
+        private ISelfInterpolatedStringHandler _parent;
+
+        public InterpolatedStringHandler(int literalLength, int formattedCount, ISelfInterpolatedStringHandler parent)
+        {
+            _parent = parent;
+            _parent.InitializeInterpolation(literalLength, formattedCount);
+        }
+
+        public void AppendLiteral(string value) => _parent.AppendLiteral(value);
+
+        public void AppendFormatted<T>(T value) => _parent.AppendFormatted(value);
+
+        public void AppendFormatted<T>(T value, string? format) => _parent.AppendFormatted(value, format);
+
+        public void AppendFormatted<T>(T value, int alignment) => _parent.AppendFormatted(value, alignment);
+
+        public void AppendFormatted<T>(T value, int alignment, string? format) =>
+            _parent.AppendFormatted(value, alignment, format);
+
+        public void AppendFormatted(ReadOnlySpan<char> value) => _parent.AppendFormatted(value);
+
+        public void AppendFormatted(ReadOnlySpan<char> value, int alignment, string? format = null) =>
+            _parent.AppendFormatted(value, alignment, format);
+
+        public void AppendFormatted(object? value, int alignment = 0, string? format = null) =>
+            _parent.AppendFormatted(value, alignment, format);
+
+        public void AppendFormatted(string? value) => _parent.AppendFormatted(value);
+
+        public void AppendFormatted(string? value, int alignment, string? format = null) =>
+            _parent.AppendFormatted(value, alignment, format);
+    }
+}

Projects/Server/Text/StringHelpers.cs

@@ -285,4 +285,22 @@ public static class StringHelpers
             4 => MemoryMarshal.Cast<byte, uint>(buffer).IndexOf((uint)0) * 4,
             _ => buffer.IndexOf((byte)0)
         };
+
+    [MethodImpl(MethodImplOptions.AggressiveInlining)]
+    public static void ReplaceAny(this Span<char> chars, ReadOnlySpan<char> invalidChars, ReadOnlySpan<char> replacementChars)
+    {
+        while (true)
+        {
+            var indexOf = chars.IndexOfAny(invalidChars);
+            if (indexOf == -1)
+            {
+                break;
+            }
+
+            var chr = chars[indexOf];
+
+            chars[indexOf] = replacementChars[invalidChars.IndexOf(chr)];
+            chars = chars[(indexOf + 1)..];
+        }
+    }
 }

Projects/Server/Utilities/Utility.cs

@@ -560,7 +560,7 @@ namespace Server
                 return str;
             }
 
-            using var sb = new ValueStringBuilder(str, stackalloc char[Math.Min(40960, str.Length)]);
+            using var sb = new ValueStringBuilder(str, stackalloc char[Math.Min(128, str.Length)]);
             ReadOnlySpan<char> invalid = stackalloc []{ '<', '>', '#' };
             ReadOnlySpan<char> replacement = stackalloc []{ '(', ')', '-' };
             sb.ReplaceAny(invalid, replacement, 0, sb.Length);
@@ -568,6 +568,19 @@ namespace Server
             return sb.ToString();
         }
 
+        public static void FixHtml(Span<char> chars)
+        {
+            if (chars.Length == 0)
+            {
+                return;
+            }
+
+            ReadOnlySpan<char> invalid = stackalloc []{ '<', '>', '#' };
+            ReadOnlySpan<char> replacement = stackalloc []{ '(', ')', '-' };
+
+            chars.ReplaceAny(invalid, replacement);
+        }
+
         public static int InsensitiveCompare(string first, string second) => first.InsensitiveCompare(second);
 
         public static bool InsensitiveStartsWith(string first, string second) => first.InsensitiveStartsWith(second);

Projects/UOContent/Engines/Bulk Orders/Books/BulkOrderBook.cs

@@ -258,11 +258,11 @@ namespace Server.Engines.BulkOrders
             }
         }
 
-        public override void GetProperties(ObjectPropertyList list)
+        public override void GetProperties(IPropertyList list)
         {
             base.GetProperties(list);
 
-            list.Add(1062344, Entries.Count.ToString()); // Deeds in book: ~1_val~
+            list.Add(1062344, $"{Entries.Count}"); // Deeds in book: ~1_val~
 
             if (!string.IsNullOrEmpty(m_BookName))
             {

Projects/UOContent/Engines/Bulk Orders/LargeBOD.cs

@@ -38,7 +38,7 @@ namespace Server.Engines.BulkOrders
 
         public override int LabelNumber => 1045151; // a bulk order deed
 
-        public override void GetProperties(ObjectPropertyList list)
+        public override void GetProperties(IPropertyList list)
         {
             base.GetProperties(list);
 
@@ -54,11 +54,12 @@ namespace Server.Engines.BulkOrders
                 list.Add(LargeBODGump.GetMaterialNumberFor(Material)); // All items must be made with x material.
             }
 
-            list.Add(1060656, AmountMax.ToString()); // amount to make: ~1_val~
+            list.Add(1060656, $"{AmountMax}"); // amount to make: ~1_val~
 
             for (var i = 0; i < _entries.Length; ++i)
             {
-                list.Add(1060658 + i, "#{0}\t{1}", _entries[i].Details.Number, _entries[i].Amount); // ~1_val~: ~2_val~
+                var entry = _entries[i];
+                list.Add(1060658 + i, $"#{entry.Details.Number}\t{entry.Amount}"); // ~1_val~: ~2_val~
             }
         }
 

Projects/UOContent/Engines/Bulk Orders/SmallBOD.cs

@@ -61,7 +61,7 @@ namespace Server.Engines.BulkOrders
 
         public override int LabelNumber => 1045151; // a bulk order deed
 
-        public override void GetProperties(ObjectPropertyList list)
+        public override void GetProperties(IPropertyList list)
         {
             base.GetProperties(list);
 
@@ -77,8 +77,8 @@ namespace Server.Engines.BulkOrders
                 list.Add(SmallBODGump.GetMaterialNumberFor(Material)); // All items must be made with x material.
             }
 
-            list.Add(1060656, AmountMax.ToString()); // amount to make: ~1_val~
-            list.Add(1060658, "#{0}\t{1}", m_Number, m_AmountCur); // ~1_val~: ~2_val~
+            list.Add(1060656, $"{AmountMax}");                // amount to make: ~1_val~
+            list.Add(1060658, $"#{m_Number}\t{m_AmountCur}"); // ~1_val~: ~2_val~
         }
 
         public override void OnDoubleClick(Mobile from)

Projects/UOContent/Engines/CannedEvil/ChampionSpawn.cs

@@ -934,21 +934,22 @@ namespace Server.Engines.CannedEvil
             return new Point3D(X + x, Y + y, Z - 15);
         }
 
-        public override void AddNameProperty(ObjectPropertyList list)
+        public override void AddNameProperty(IPropertyList list)
         {
             list.Add("champion spawn");
         }
 
-        public override void GetProperties(ObjectPropertyList list)
+        public override void GetProperties(IPropertyList list)
         {
             base.GetProperties(list);
 
             if (m_Active)
             {
                 list.Add(1060742); // active
-                list.Add(1060658, "Type\t{0}", m_Type); // ~1_val~: ~2_val~
-                list.Add(1060659, "Level\t{0}", Level); // ~1_val~: ~2_val~
-                list.Add(1060660, "Kills\t{0} of {1} ({2:F1}%)", m_Kills, MaxKills, 100.0 * ((double)m_Kills / MaxKills)); // ~1_val~: ~2_val~
+                list.Add(1060658, $"Type\t{m_Type}"); // ~1_val~: ~2_val~
+                list.Add(1060659, $"Level\t{Level}"); // ~1_val~: ~2_val~
+                var killRatio = 100.0 * ((double)m_Kills / MaxKills);
+                list.Add(1060660, $"Kills\t{m_Kills} of {MaxKills} ({killRatio:F1}%)"); // ~1_val~: ~2_val~
                 //list.Add(1060661, "Spawn Range\t{0}", m_SpawnRange); // ~1_val~: ~2_val~
             }
             else
@@ -961,11 +962,11 @@ namespace Server.Engines.CannedEvil
         {
             if (m_Active)
             {
-                LabelTo(from, "{0} (Active; Level: {1}; Kills: {2}/{3})", m_Type, Level, m_Kills, MaxKills);
+                LabelTo(from, $"{m_Type} (Active; Level: {Level}; Kills: {m_Kills}/{MaxKills})");
             }
             else
             {
-                LabelTo(from, "{0} (Inactive)", m_Type);
+                LabelTo(from, $"{m_Type} (Inactive)");
             }
         }
 

Projects/UOContent/Engines/ConPVP/Gumps/AcceptTeamGump.cs

@@ -163,23 +163,20 @@ namespace Server.Engines.ConPVP
             AddBorderedText(35, y, 190, 20, $"Tiebreaker: {tieText}", LabelColor32, BlackColor32);
             y += 20;
 
-            var sdText = "Off";
+            string sdText;
 
             if (tourney.SuddenDeath > TimeSpan.Zero)
             {
-                sdText = $"{(int)tourney.SuddenDeath.TotalMinutes}:{tourney.SuddenDeath.Seconds:D2}";
-
-                if (tourney.SuddenDeathRounds > 0)
-                {
-                    sdText = $"{sdText} (first {tourney.SuddenDeathRounds} rounds)";
-                }
-                else
-                {
-                    sdText = $"{sdText} (all rounds)";
-                }
+                sdText = tourney.SuddenDeathRounds > 0 ?
+                    $"Sudden Death: {(int)tourney.SuddenDeath.TotalMinutes}:{tourney.SuddenDeath.Seconds:D2} (first {tourney.SuddenDeathRounds} rounds)" :
+                    $"Sudden Death: {(int)tourney.SuddenDeath.TotalMinutes}:{tourney.SuddenDeath.Seconds:D2} (all rounds)";
+            }
+            else
+            {
+                sdText = "Sudden Death: Off";
             }
 
-            AddBorderedText(35, y, 240, 20, $"Sudden Death: {sdText}", LabelColor32, BlackColor32);
+            AddBorderedText(35, y, 240, 20, sdText, LabelColor32, BlackColor32);
             y += 20;
 
             y += 6;

Projects/UOContent/Engines/ConPVP/Gumps/ConfirmSignupGump.cs

@@ -169,23 +169,20 @@ namespace Server.Engines.ConPVP
             AddBorderedText(35, y, 190, 20, $"Tiebreaker: {tieText}", LabelColor32, BlackColor32);
             y += 20;
 
-            var sdText = "Off";
+            string sdText;
 
             if (tourney.SuddenDeath > TimeSpan.Zero)
             {
-                sdText = $"{(int)tourney.SuddenDeath.TotalMinutes}:{tourney.SuddenDeath.Seconds:D2}";
-
-                if (tourney.SuddenDeathRounds > 0)
-                {
-                    sdText = $"{sdText} (first {tourney.SuddenDeathRounds} rounds)";
-                }
-                else
-                {
-                    sdText = $"{sdText} (all rounds)";
-                }
+                sdText = tourney.SuddenDeathRounds > 0 ?
+                    $"Sudden Death: {(int)tourney.SuddenDeath.TotalMinutes}:{tourney.SuddenDeath.Seconds:D2} (first {tourney.SuddenDeathRounds} rounds)" :
+                    $"Sudden Death: {(int)tourney.SuddenDeath.TotalMinutes}:{tourney.SuddenDeath.Seconds:D2} (all rounds)";
+            }
+            else
+            {
+                sdText = "Sudden Death: Off";
             }
 
-            AddBorderedText(35, y, 240, 20, $"Sudden Death: {sdText}", LabelColor32, BlackColor32);
+            AddBorderedText(35, y, 240, 20, sdText, LabelColor32, BlackColor32);
             y += 20;
 
             y += 6;

Projects/UOContent/Engines/ConPVP/Gumps/TournamentBracketGump.cs

@@ -214,23 +214,20 @@ namespace Server.Engines.ConPVP
                         AddHtml(35, y, 190, 20, $"Tiebreaker: {tieText}");
                         y += 20;
 
-                        var sdText = "Off";
+                        string sdText;
 
                         if (tourney.SuddenDeath > TimeSpan.Zero)
                         {
-                            sdText = $"{(int)tourney.SuddenDeath.TotalMinutes}:{tourney.SuddenDeath.Seconds:D2}";
-
-                            if (tourney.SuddenDeathRounds > 0)
-                            {
-                                sdText = $"{sdText} (first {tourney.SuddenDeathRounds} rounds)";
-                            }
-                            else
-                            {
-                                sdText = $"{sdText} (all rounds)";
-                            }
+                            sdText = tourney.SuddenDeathRounds > 0 ?
+                                $"Sudden Death: {(int)tourney.SuddenDeath.TotalMinutes}:{tourney.SuddenDeath.Seconds:D2} (first {tourney.SuddenDeathRounds} rounds)" :
+                                $"Sudden Death: {(int)tourney.SuddenDeath.TotalMinutes}:{tourney.SuddenDeath.Seconds:D2} (all rounds)";
+                        }
+                        else
+                        {
+                            sdText = "Sudden Death: Off";
                         }
 
-                        AddHtml(35, y, 240, 20, $"Sudden Death: {sdText}");
+                        AddHtml(35, y, 240, 20, sdText);
                         y += 20;
 
                         y += 8;

Projects/UOContent/Engines/Factions/Items/Sigil.cs

@@ -128,7 +128,7 @@ namespace Server.Factions
             InvalidateProperties();
         }
 
-        public override void GetProperties(ObjectPropertyList list)
+        public override void GetProperties(IPropertyList list)
         {
             base.GetProperties(list);
 

Projects/UOContent/Engines/Factions/Items/Traps/FactionTrapRemovalKit.cs

@@ -30,12 +30,12 @@ namespace Server.Factions
             }
         }
 
-        public override void GetProperties(ObjectPropertyList list)
+        public override void GetProperties(IPropertyList list)
         {
             base.GetProperties(list);
 
             // NOTE: OSI does not list uses remaining; intentional difference
-            list.Add(1060584, Charges.ToString()); // uses remaining: ~1_val~
+            list.Add(1060584, $"{Charges}"); // uses remaining: ~1_val~
         }
 
         public override void Serialize(IGenericWriter writer)

Projects/UOContent/Engines/Factions/Mobiles/Guards/BaseFactionGuard.cs

@@ -308,7 +308,7 @@ namespace Server.Factions
             }
         }
 
-        public override void GetProperties(ObjectPropertyList list)
+        public override void GetProperties(IPropertyList list)
         {
             base.GetProperties(list);
 

Projects/UOContent/Engines/ML Quests/Items/APersonalLetterAddressedToAhie.cs

@@ -15,7 +15,7 @@ namespace Server.Items
 
         public override bool Nontransferable => true;
 
-        public override void AddNameProperties(ObjectPropertyList list)
+        public override void AddNameProperties(IPropertyList list)
         {
             base.AddNameProperties(list);
             AddQuestItemProperty(list);

Projects/UOContent/Engines/ML Quests/Items/AlchemistsBandage.cs

@@ -17,7 +17,7 @@ namespace Server.Items
 
         public override bool Nontransferable => true;
 
-        public override void AddNameProperties(ObjectPropertyList list)
+        public override void AddNameProperties(IPropertyList list)
         {
             base.AddNameProperties(list);
             AddQuestItemProperty(list);

Projects/UOContent/Engines/ML Quests/Items/BasinOfCrystalClearWater.cs

@@ -13,7 +13,7 @@ namespace Server.Items
 
         public override bool Nontransferable => true;
 
-        public override void AddNameProperties(ObjectPropertyList list)
+        public override void AddNameProperties(IPropertyList list)
         {
             base.AddNameProperties(list);
             AddQuestItemProperty(list);

Projects/UOContent/Engines/ML Quests/Items/BridesLetter.cs

@@ -13,7 +13,7 @@ namespace Server.Items
 
         public override bool Nontransferable => true;
 
-        public override void AddNameProperties(ObjectPropertyList list)
+        public override void AddNameProperties(IPropertyList list)
         {
             base.AddNameProperties(list);
             AddQuestItemProperty(list);

Projects/UOContent/Engines/ML Quests/Items/CompletedTuitionReimbursementForm.cs

@@ -13,7 +13,7 @@ namespace Server.Items
 
         public override bool Nontransferable => true;
 
-        public override void AddNameProperties(ObjectPropertyList list)
+        public override void AddNameProperties(IPropertyList list)
         {
             base.AddNameProperties(list);
             AddQuestItemProperty(list);

Projects/UOContent/Engines/ML Quests/Items/CrateForSledge.cs

@@ -15,7 +15,7 @@ namespace Server.Items
 
         public override bool Nontransferable => true;
 
-        public override void AddNameProperties(ObjectPropertyList list)
+        public override void AddNameProperties(IPropertyList list)
         {
             base.AddNameProperties(list);
             AddQuestItemProperty(list);

Projects/UOContent/Engines/ML Quests/Items/DreadSpiderSilk.cs

@@ -17,7 +17,7 @@ namespace Server.Items
 
         public override bool Nontransferable => true;
 
-        public override void AddNameProperties(ObjectPropertyList list)
+        public override void AddNameProperties(IPropertyList list)
         {
             base.AddNameProperties(list);
             AddQuestItemProperty(list);

Projects/UOContent/Engines/ML Quests/Items/FragmentOfAMapDelivery.cs

@@ -13,7 +13,7 @@ namespace Server.Items
 
         public override bool Nontransferable => true;
 
-        public override void AddNameProperties(ObjectPropertyList list)
+        public override void AddNameProperties(IPropertyList list)
         {
             base.AddNameProperties(list);
             AddQuestItemProperty(list);

Projects/UOContent/Engines/ML Quests/Items/FriendsOfTheLibraryApplication.cs

@@ -13,7 +13,7 @@ namespace Server.Items
 
         public override bool Nontransferable => true;
 
-        public override void AddNameProperties(ObjectPropertyList list)
+        public override void AddNameProperties(IPropertyList list)
         {
             base.AddNameProperties(list);
             AddQuestItemProperty(list);

Projects/UOContent/Engines/ML Quests/Items/GiftForArielle.cs

@@ -14,7 +14,7 @@ namespace Server.Items
 
         public override bool Nontransferable => true;
 
-        public override void AddNameProperties(ObjectPropertyList list)
+        public override void AddNameProperties(IPropertyList list)
         {
             base.AddNameProperties(list);
             AddQuestItemProperty(list);

Projects/UOContent/Engines/ML Quests/Items/NotarizedApplication.cs

@@ -13,7 +13,7 @@ namespace Server.Items
 
         public override bool Nontransferable => true;
 
-        public override void AddNameProperties(ObjectPropertyList list)
+        public override void AddNameProperties(IPropertyList list)
         {
             base.AddNameProperties(list);
             AddQuestItemProperty(list);

Projects/UOContent/Engines/ML Quests/Items/OfficialSealingWax.cs

@@ -17,7 +17,7 @@ namespace Server.Items
 
         public override bool Nontransferable => true;
 
-        public override void AddNameProperties(ObjectPropertyList list)
+        public override void AddNameProperties(IPropertyList list)
         {
             base.AddNameProperties(list);
             AddQuestItemProperty(list);

Projects/UOContent/Engines/ML Quests/Items/PortraitOfTheBride.cs

@@ -13,7 +13,7 @@ namespace Server.Items
 
         public override bool Nontransferable => true;
 
-        public override void AddNameProperties(ObjectPropertyList list)
+        public override void AddNameProperties(IPropertyList list)
         {
             base.AddNameProperties(list);
             AddQuestItemProperty(list);

Projects/UOContent/Engines/ML Quests/Items/PrismaticAmber.cs

@@ -13,7 +13,7 @@ namespace Server.Items
 
         public override int LabelNumber => 1075299; // Prismatic Amber
 
-        public override void AddNameProperties(ObjectPropertyList list)
+        public override void AddNameProperties(IPropertyList list)
         {
             base.AddNameProperties(list);
 

Projects/UOContent/Engines/ML Quests/Items/QuestGiverItem.cs

@@ -27,7 +27,7 @@ namespace Server.Engines.MLQuests.Items
         public List<MLQuest> MLQuests => m_MLQuests ??
                                          (m_MLQuests = MLQuestSystem.FindQuestList(GetType()) ?? MLQuestSystem.EmptyList);
 
-        public override void AddNameProperties(ObjectPropertyList list)
+        public override void AddNameProperties(IPropertyList list)
         {
             base.AddNameProperties(list);
 
@@ -105,7 +105,7 @@ namespace Server.Engines.MLQuests.Items
         {
         }
 
-        public override void AddNameProperties(ObjectPropertyList list)
+        public override void AddNameProperties(IPropertyList list)
         {
             base.AddNameProperties(list);
 

Projects/UOContent/Engines/ML Quests/Items/ReginasLetter.cs

@@ -13,7 +13,7 @@ namespace Server.Items
 
         public override bool Nontransferable => true;
 
-        public override void AddNameProperties(ObjectPropertyList list)
+        public override void AddNameProperties(IPropertyList list)
         {
             base.AddNameProperties(list);
             AddQuestItemProperty(list);

Projects/UOContent/Engines/ML Quests/Items/ReginasRing.cs

@@ -13,7 +13,7 @@ namespace Server.Items
 
         public override bool Nontransferable => true;
 
-        public override void AddNameProperties(ObjectPropertyList list)
+        public override void AddNameProperties(IPropertyList list)
         {
             base.AddNameProperties(list);
             AddQuestItemProperty(list);

Projects/UOContent/Engines/ML Quests/Items/SealedNotesForJamal.cs

@@ -14,7 +14,7 @@ namespace Server.Items
 
         public override bool Nontransferable => true;
 
-        public override void AddNameProperties(ObjectPropertyList list)
+        public override void AddNameProperties(IPropertyList list)
         {
             base.AddNameProperties(list);
             AddQuestItemProperty(list);

Projects/UOContent/Engines/ML Quests/Items/SealingWaxOrderAddressedToPetrus.cs

@@ -13,7 +13,7 @@ namespace Server.Items
 
         public override bool Nontransferable => true;
 
-        public override void AddNameProperties(ObjectPropertyList list)
+        public override void AddNameProperties(IPropertyList list)
         {
             base.AddNameProperties(list);
             AddQuestItemProperty(list);

Projects/UOContent/Engines/ML Quests/Items/SignedTuitionReimbursementForm.cs

@@ -13,7 +13,7 @@ namespace Server.Items
 
         public override bool Nontransferable => true;
 
-        public override void AddNameProperties(ObjectPropertyList list)
+        public override void AddNameProperties(IPropertyList list)
         {
             base.AddNameProperties(list);
             AddQuestItemProperty(list);

Projects/UOContent/Engines/ML Quests/Items/SpiritBottle.cs

@@ -13,7 +13,7 @@ namespace Server.Items
 
         public override bool Nontransferable => true;
 
-        public override void AddNameProperties(ObjectPropertyList list)
+        public override void AddNameProperties(IPropertyList list)
         {
             base.AddNameProperties(list);
             AddQuestItemProperty(list);

Projects/UOContent/Engines/ML Quests/Items/TaintedTreeSample.cs

@@ -17,7 +17,7 @@ namespace Server.Items
 
         public override bool Nontransferable => true;
 
-        public override void AddNameProperties(ObjectPropertyList list)
+        public override void AddNameProperties(IPropertyList list)
         {
             base.AddNameProperties(list);
             AddQuestItemProperty(list);

Projects/UOContent/Engines/ML Quests/Items/Teleporters.cs

@@ -71,7 +71,7 @@ namespace Server.Engines.MLQuests.Items
             return false;
         }
 
-        public override void GetProperties(ObjectPropertyList list)
+        public override void GetProperties(IPropertyList list)
         {
             base.GetProperties(list);
 
@@ -179,7 +179,7 @@ namespace Server.Engines.MLQuests.Items
             return true;
         }
 
-        public override void GetProperties(ObjectPropertyList list)
+        public override void GetProperties(IPropertyList list)
         {
             base.GetProperties(list);
 

Projects/UOContent/Engines/ML Quests/Items/TuitionReimbursementForm.cs

@@ -13,7 +13,7 @@ namespace Server.Items
 
         public override bool Nontransferable => true;
 
-        public override void AddNameProperties(ObjectPropertyList list)
+        public override void AddNameProperties(IPropertyList list)
         {
             base.AddNameProperties(list);
             AddQuestItemProperty(list);

Projects/UOContent/Engines/Plants/PlantItem.cs

@@ -248,7 +248,7 @@ namespace Server.Engines.Plants
             InvalidateProperties();
         }
 
-        public override void AddNameProperty(ObjectPropertyList list)
+        public override void AddNameProperty(IPropertyList list)
         {
             if (m_PlantStatus >= PlantStatus.DeadTwigs)
             {

Projects/UOContent/Engines/Plants/Seed.cs

@@ -124,7 +124,7 @@ namespace Server.Engines.Plants
             return hueInfo.IsBright() ? 1113491 : 1113490; // ~1_amount~ [bright] ~2_val~ seeds
         }
 
-        public override void AddNameProperty(ObjectPropertyList list)
+        public override void AddNameProperty(IPropertyList list)
         {
             list.Add(GetLabel(out var args), args);
         }

Projects/UOContent/Engines/Quests/Collector/Items/Obsidian.cs

@@ -141,7 +141,7 @@ namespace Server.Engines.Quests.Collector
 
         public static string RandomName(Mobile from) => m_Names.RandomElement() ?? from.Name;
 
-        public override void AddNameProperty(ObjectPropertyList list)
+        public override void AddNameProperty(IPropertyList list)
         {
             if (m_Quantity < m_Partial)
             {

Projects/UOContent/Engines/Quests/Collector/Items/PaintedImage.cs

@@ -31,7 +31,7 @@ namespace Server.Engines.Quests.Collector
             }
         }
 
-        public override void AddNameProperty(ObjectPropertyList list)
+        public override void AddNameProperty(IPropertyList list)
         {
             var info = ImageTypeInfo.Get(m_Image);
             list.Add(1060847, $"#1055126\t#{info.Name}"); // a painted image of:

Projects/UOContent/Engines/Quests/Core/Items/HornOfRetreat.cs

@@ -43,11 +43,11 @@ namespace Server.Engines.Quests
 
         public virtual bool ValidateUse(Mobile from) => true;
 
-        public override void GetProperties(ObjectPropertyList list)
+        public override void GetProperties(IPropertyList list)
         {
             base.GetProperties(list);
 
-            list.Add(1060741, m_Charges.ToString()); // charges: ~1_val~
+            list.Add(1060741, $"{m_Charges}"); // charges: ~1_val~
         }
 
         public override void OnDoubleClick(Mobile from)

Projects/UOContent/Engines/Quests/Uzeraan Turmoil/Items/SchmendrickApprenticeCorpse.cs

@@ -70,7 +70,7 @@ namespace Server.Engines.Quests.Haven
             return new FacialHairInfo(Race.Human.RandomFacialHair(false), m_HairHue);
         }
 
-        public override void AddNameProperty(ObjectPropertyList list)
+        public override void AddNameProperty(IPropertyList list)
         {
             if (ItemID == 0x2006) // Corpse form
             {

Projects/UOContent/Engines/Quests/Uzeraan Turmoil/Mobiles/MilitiaFighter.cs

@@ -108,7 +108,7 @@ namespace Server.Engines.Quests.Haven
         {
         }
 
-        public override void AddNameProperty(ObjectPropertyList list)
+        public override void AddNameProperty(IPropertyList list)
         {
             if (ItemID == 0x2006) // Corpse form
             {

Projects/UOContent/Engines/Quests/Witch Apprentice/Items/HagApprenticeCorpse.cs

@@ -39,7 +39,7 @@ namespace Server.Engines.Quests.Hag
 
         private static List<Item> GetEquipment() => new();
 
-        public override void AddNameProperty(ObjectPropertyList list)
+        public override void AddNameProperty(IPropertyList list)
         {
             list.Add("a charred corpse");
         }

Projects/UOContent/Engines/Spawners/BaseSpawner.cs

@@ -353,11 +353,11 @@ namespace Server.Engines.Spawners
             from.SendGump(new SpawnerGump(this));
         }
 
-        public virtual void GetSpawnerProperties(ObjectPropertyList list)
+        public virtual void GetSpawnerProperties(IPropertyList list)
         {
         }
 
-        public override void GetProperties(ObjectPropertyList list)
+        public override void GetProperties(IPropertyList list)
         {
             base.GetProperties(list);
 
@@ -365,18 +365,19 @@ namespace Server.Engines.Spawners
             {
                 list.Add(1060742); // active
 
-                list.Add(1060656, m_Count.ToString()); // amount to make: ~1_val~
-                list.Add(1061169, m_HomeRange.ToString()); // range ~1_val~
-                list.Add(1050039, "walking range:\t{0}", m_WalkingRange); // ~1_NUMBER~ ~2_ITEMNAME~
-                list.Add(1053099, "group:\t{0}", m_Group); // ~1_oretype~: ~2_armortype~
-                list.Add(1060847, "team:\t{0}", m_Team); // ~1_val~ ~2_val~
-                list.Add(1063483, "delay:\t{0} to {1}", m_MinDelay, m_MaxDelay); // ~1_MATERIAL~: ~2_ITEMNAME~
+                list.Add(1060656, $"{m_Count}");                            // amount to make: ~1_val~
+                list.Add(1061169, $"{m_HomeRange}");                        // range ~1_val~
+                list.Add(1050039, $"walking range:\t{m_WalkingRange}");     // ~1_NUMBER~ ~2_ITEMNAME~
+                list.Add(1053099, $"group:\t{m_Group}");                    // ~1_oretype~: ~2_armortype~
+                list.Add(1060847, $"team:\t{m_Team}");                      // ~1_val~ ~2_val~
+                list.Add(1063483, $"delay:\t{m_MinDelay} to {m_MaxDelay}"); // ~1_MATERIAL~: ~2_ITEMNAME~
 
                 GetSpawnerProperties(list);
 
                 for (var i = 0; i < 6 && i < Entries.Count; ++i)
                 {
-                    list.Add(1060658 + i, "\t{0}\t{1}", Entries[i].SpawnedName, CountSpawns(Entries[i]));
+                    var entry = Entries[i];
+                    list.Add(1060658 + i, $"\t{entry.SpawnedName}\t{CountSpawns(entry)}");
                 }
             }
             else
@@ -794,7 +795,7 @@ namespace Server.Engines.Spawners
             }
             else
             {
-                m_Timer?.Stop();
+                m_Timer.Stop();
                 m_Timer.Delay = delay;
             }
 

Projects/UOContent/Engines/Spawners/RegionSpawner.cs

@@ -88,13 +88,13 @@ namespace Server.Engines.Spawners
             json.SetProperty("region", options, SpawnRegion.Name);
         }
 
-        public override void GetSpawnerProperties(ObjectPropertyList list)
+        public override void GetSpawnerProperties(IPropertyList list)
         {
             base.GetSpawnerProperties(list);
 
             if (Running && m_SpawnRegion != null)
             {
-                list.Add(1076228, "region:\t{0}", m_SpawnRegion.Name); // ~1_DUMMY~ ~2_DUMMY~
+                list.Add(1076228, $"region:\t{m_SpawnRegion.Name}"); // ~1_DUMMY~ ~2_DUMMY~
             }
         }
 

Projects/UOContent/Engines/Treasures of Tokuno/BasePigmentsOfTokuno.cs

@@ -113,7 +113,7 @@ namespace Server.Items
             set { }
         }
 
-        public override void GetProperties(ObjectPropertyList list)
+        public override void GetProperties(IPropertyList list)
         {
             base.GetProperties(list);
 
@@ -122,7 +122,7 @@ namespace Server.Items
                 TextDefinition.AddTo(list, m_Label);
             }
 
-            list.Add(1060584, m_UsesRemaining.ToString()); // uses remaining: ~1_val~
+            list.Add(1060584, $"{m_UsesRemaining}"); // uses remaining: ~1_val~
         }
 
         public override void OnDoubleClick(Mobile from)

Projects/UOContent/Engines/Treasures of Tokuno/LesserArtifacts.cs

@@ -713,7 +713,7 @@ namespace Server.Items
             Utility.Intern(ref m_UrnName);
         }
 
-        public override void AddNameProperty(ObjectPropertyList list)
+        public override void AddNameProperty(IPropertyList list)
         {
             list.Add(1070935, m_UrnName); // Ancient Urn of ~1_name~
         }
@@ -772,7 +772,7 @@ namespace Server.Items
             Utility.Intern(ref m_SwordsName);
         }
 
-        public override void AddNameProperty(ObjectPropertyList list)
+        public override void AddNameProperty(IPropertyList list)
         {
             list.Add(1070936, m_SwordsName); // Honorable Swords of ~1_name~
         }

Projects/UOContent/Engines/Veteran Rewards/Character Statue Maker/CharacterStatue.cs

@@ -128,7 +128,7 @@ namespace Server.Mobiles
             DisplayPaperdollTo(from);
         }
 
-        public override void GetProperties(ObjectPropertyList list)
+        public override void GetProperties(IPropertyList list)
         {
             base.GetProperties(list);
 
@@ -496,7 +496,7 @@ namespace Server.Mobiles
             }
         }
 
-        public override void GetProperties(ObjectPropertyList list)
+        public override void GetProperties(IPropertyList list)
         {
             base.GetProperties(list);
 

Projects/UOContent/Engines/Veteran Rewards/Character Statue Maker/CharacterStatueMaker.cs

@@ -71,7 +71,7 @@ namespace Server.Items
             }
         }
 
-        public override void GetProperties(ObjectPropertyList list)
+        public override void GetProperties(IPropertyList list)
         {
             base.GetProperties(list);
 

Projects/UOContent/Holiday Stuff/Halloween/2006/Items/TwilightLantern.cs

@@ -12,7 +12,7 @@ namespace Server.Items
 
         public override bool AllowEquippedCast(Mobile from) => true;
 
-        public override void GetProperties(ObjectPropertyList list)
+        public override void GetProperties(IPropertyList list)
         {
             base.GetProperties(list);
 

Projects/UOContent/Holiday Stuff/Valentine/2011/Items/StValentinesBears.cs

@@ -47,7 +47,7 @@ namespace Server.Items
 
         public bool CanSign => !IsSigned || Core.Now <= EditLimit;
 
-        public override void AddNameProperty(ObjectPropertyList list)
+        public override void AddNameProperty(IPropertyList list)
         {
             if (_owner != null)
             {
@@ -63,7 +63,7 @@ namespace Server.Items
             AddLine(list, 1150303, _line3); // [ ~1_LINE2~ ]
         }
 
-        private static void AddLine(ObjectPropertyList list, int cliloc, string line)
+        private static void AddLine(IPropertyList list, int cliloc, string line)
         {
             if (line != null)
             {

Projects/UOContent/Holiday Stuff/Valentine/2012/Items/CupidsArrow.cs

@@ -27,7 +27,7 @@ namespace Server.Items
 
         public bool IsSigned => _from != null && _to != null;
 
-        public override void AddNameProperty(ObjectPropertyList list)
+        public override void AddNameProperty(IPropertyList list)
         {
             base.AddNameProperty(list);
 

Projects/UOContent/Items/Addons/AddonComponent.cs

@@ -160,7 +160,7 @@ namespace Server.Items
             }
         }
 /*
-        public override void GetProperties(ObjectPropertyList list) => _addon?.GetProperties(list);
+        public override void GetProperties(IPropertyList list) => _addon?.GetProperties(list);
 
         public override void GetContextMenuEntries(Mobile from, List<ContextMenuEntry> list) =>
             _addon?.GetContextMenuEntries(from, list);

Projects/UOContent/Items/Addons/AddonContainerComponent.cs

@@ -77,7 +77,7 @@ namespace Server.Items
             }
         }
 
-        public override void GetProperties(ObjectPropertyList list) => _addon?.GetProperties(list);
+        public override void GetProperties(IPropertyList list) => _addon?.GetProperties(list);
 
         public override void GetContextMenuEntries(Mobile from, List<ContextMenuEntry> list) =>
             _addon?.GetContextMenuEntries(from, list);

Projects/UOContent/Items/Addons/BaseAddonContainer.cs

@@ -168,7 +168,7 @@ namespace Server.Items
             base.OnDelete();
         }
 
-        public override void GetProperties(ObjectPropertyList list)
+        public override void GetProperties(IPropertyList list)
         {
             base.GetProperties(list);
 

Projects/UOContent/Items/Addons/BaseAddonContainerDeed.cs

@@ -97,7 +97,7 @@ namespace Server.Items
             }
         }
 
-        public override void GetProperties(ObjectPropertyList list)
+        public override void GetProperties(IPropertyList list)
         {
             base.GetProperties(list);
 

Projects/UOContent/Items/Aquarium/Aquarium.cs

@@ -364,18 +364,18 @@ namespace Server.Items
             }
         }
 
-        public override void AddNameProperties(ObjectPropertyList list)
+        public override void AddNameProperties(IPropertyList list)
         {
             base.AddNameProperties(list);
 
             if (_vacationLeft > 0)
             {
-                list.Add(1074430, _vacationLeft.ToString()); // Vacation days left: ~1_DAYS
+                list.Add(1074430, $"{_vacationLeft}"); // Vacation days left: ~1_DAYS
             }
 
             if (_events.Count > 0)
             {
-                list.Add(1074426, _events.Count.ToString()); // ~1_NUM~ event(s) to view!
+                list.Add(1074426, $"{_events.Count}"); // ~1_NUM~ event(s) to view!
             }
 
             if (_rewardAvailable)
@@ -383,60 +383,54 @@ namespace Server.Items
                 list.Add(1074362); // A reward is available!
             }
 
-            list.Add(1074247, "{0}\t{1}", LiveCreatures, MaxLiveCreatures); // Live Creatures: ~1_NUM~ / ~2_MAX~
+            list.Add(1074247, $"{LiveCreatures}\t{MaxLiveCreatures}"); // Live Creatures: ~1_NUM~ / ~2_MAX~
 
             var dead = DeadCreatures;
 
             if (dead > 0)
             {
-                list.Add(1074248, dead.ToString()); // Dead Creatures: ~1_NUM~
+                list.Add(1074248, $"{dead}"); // Dead Creatures: ~1_NUM~
             }
 
             var decorations = Items.Count - LiveCreatures - dead;
 
             if (decorations > 0)
             {
-                list.Add(1074249, decorations.ToString()); // Decorations: ~1_NUM~
+                list.Add(1074249, $"{decorations}"); // Decorations: ~1_NUM~
             }
 
-            list.Add(1074250, "#{0}", FoodNumber());  // Food state: ~1_STATE~
-            list.Add(1074251, "#{0}", WaterNumber()); // Water state: ~1_STATE~
+            list.Add(1074250, $"#{FoodNumber()}");  // Food state: ~1_STATE~
+            list.Add(1074251, $"#{WaterNumber()}"); // Water state: ~1_STATE~
 
             if (_food.State == (int)FoodState.Dead)
             {
-                list.Add(1074577, "{0}\t{1}", _food.Added, _food.Improve); // Food Added: ~1_CUR~ Needed: ~2_NEED~
+                list.Add(1074577, $"{_food.Added}\t{_food.Improve}"); // Food Added: ~1_CUR~ Needed: ~2_NEED~
             }
             else if (_food.State == (int)FoodState.Overfed)
             {
-                list.Add(1074577, "{0}\t{1}", _food.Added, _food.Maintain); // Food Added: ~1_CUR~ Needed: ~2_NEED~
+                list.Add(1074577, $"{_food.Added}\t{_food.Maintain}"); // Food Added: ~1_CUR~ Needed: ~2_NEED~
             }
             else
             {
                 list.Add(
                     1074253, // Food Added: ~1_CUR~ Feed: ~2_NEED~ Improve: ~3_GROW~
-                    "{0}\t{1}\t{2}",
-                    _food.Added,
-                    _food.Maintain,
-                    _food.Improve
+                    $"{_food.Added}\t{_food.Maintain}\t{_food.Improve}"
                 );
             }
 
             if (_water.State == (int)WaterState.Dead)
             {
-                list.Add(1074578, "{0}\t{1}", _water.Added, _water.Improve); // Water Added: ~1_CUR~ Needed: ~2_NEED~
+                list.Add(1074578, $"{_water.Added}\t{_water.Improve}"); // Water Added: ~1_CUR~ Needed: ~2_NEED~
             }
             else if (_water.State == (int)WaterState.Strong)
             {
-                list.Add(1074578, "{0}\t{1}", _water.Added, _water.Maintain); // Water Added: ~1_CUR~ Needed: ~2_NEED~
+                list.Add(1074578, $"{_water.Added}\t{_water.Maintain}"); // Water Added: ~1_CUR~ Needed: ~2_NEED~
             }
             else
             {
                 list.Add(
                     1074254, // Water Added: ~1_CUR~ Maintain: ~2_NEED~ Improve: ~3_GROW~
-                    "{0}\t{1}\t{2}",
-                    _water.Added,
-                    _water.Maintain,
-                    _water.Improve
+                    $"{_water.Added}\t{_water.Maintain}\t{_water.Improve}"
                 );
             }
         }

Projects/UOContent/Items/Aquarium/AquariumFishingNet.cs

@@ -15,7 +15,7 @@ namespace Server.Items
 
         public override bool RequireDeepWater => false;
 
-        protected override void AddNetProperties(ObjectPropertyList list)
+        protected override void AddNetProperties(IPropertyList list)
         {
         }
 

Projects/UOContent/Items/Aquarium/BaseFish.cs

@@ -60,7 +60,7 @@ namespace Server.Items
             return Dead ? 1073623 : 1073622; // A [dead/live] aquarium creature
         }
 
-        public override void GetProperties(ObjectPropertyList list)
+        public override void GetProperties(IPropertyList list)
         {
             base.GetProperties(list);
 

Projects/UOContent/Items/Aquarium/FishBowl.cs

@@ -78,7 +78,7 @@ namespace Server.Items
             return base.CheckLift(from, item, ref reject);
         }
 
-        public override void AddNameProperties(ObjectPropertyList list)
+        public override void AddNameProperties(IPropertyList list)
         {
             base.AddNameProperties(list);
 
@@ -88,7 +88,7 @@ namespace Server.Items
 
                 if (fish != null)
                 {
-                    list.Add(1074494, "#{0}", fish.LabelNumber); // Contains: ~1_CREATURE~
+                    list.Add(1074494, $"#{fish.LabelNumber}"); // Contains: ~1_CREATURE~
                 }
             }
         }

Projects/UOContent/Items/Aquarium/Rewards/AquariumMessage.cs

@@ -12,7 +12,7 @@ namespace Server.Items
 
         public override int LabelNumber => 1073894; // Message in a Bottle
 
-        public override void AddNameProperties(ObjectPropertyList list)
+        public override void AddNameProperties(IPropertyList list)
         {
             base.AddNameProperties(list);
 

Projects/UOContent/Items/Aquarium/Rewards/CaptainBlackheartsFishingPole.cs

@@ -12,7 +12,7 @@ namespace Server.Items
 
         public override int LabelNumber => 1074571; // Captain Blackheart's Fishing Pole
 
-        public override void AddNameProperties(ObjectPropertyList list)
+        public override void AddNameProperties(IPropertyList list)
         {
             base.AddNameProperties(list);
 

Projects/UOContent/Items/Aquarium/Rewards/CraftysFishingHat.cs

@@ -21,7 +21,7 @@ namespace Server.Items
         public override int InitMinHits => 20;
         public override int InitMaxHits => 30;
 
-        public override void AddNameProperties(ObjectPropertyList list)
+        public override void AddNameProperties(IPropertyList list)
         {
             base.AddNameProperties(list);
 

Projects/UOContent/Items/Aquarium/Rewards/FishBones.cs

@@ -13,7 +13,7 @@ namespace Server.Items
         public override int LabelNumber => 1074601; // Fish bones
         public override double DefaultWeight => 1.0;
 
-        public override void AddNameProperties(ObjectPropertyList list)
+        public override void AddNameProperties(IPropertyList list)
         {
             base.AddNameProperties(list);
 

Projects/UOContent/Items/Aquarium/Rewards/IslandStatue.cs

@@ -13,7 +13,7 @@ namespace Server.Items
         public override int LabelNumber => 1074600; // An island statue
         public override double DefaultWeight => 1.0;
 
-        public override void AddNameProperties(ObjectPropertyList list)
+        public override void AddNameProperties(IPropertyList list)
         {
             base.AddNameProperties(list);
 

Projects/UOContent/Items/Aquarium/Rewards/Shell.cs

@@ -13,7 +13,7 @@ namespace Server.Items
         public override int LabelNumber => 1074598; // A shell
         public override double DefaultWeight => 1.0;
 
-        public override void AddNameProperties(ObjectPropertyList list)
+        public override void AddNameProperties(IPropertyList list)
         {
             base.AddNameProperties(list);
 

Projects/UOContent/Items/Aquarium/Rewards/ToyBoat.cs

@@ -14,7 +14,7 @@ namespace Server.Items
         public override int LabelNumber => 1074363; // A toy boat
         public override double DefaultWeight => 1.0;
 
-        public override void AddNameProperties(ObjectPropertyList list)
+        public override void AddNameProperties(IPropertyList list)
         {
             base.AddNameProperties(list);
 

Projects/UOContent/Items/Aquarium/Rewards/WaterloggedBoots.cs

@@ -24,7 +24,7 @@ namespace Server.Items
 
         public override int LabelNumber => 1074364; // Waterlogged boots
 
-        public override void AddNameProperties(ObjectPropertyList list)
+        public override void AddNameProperties(IPropertyList list)
         {
             base.AddNameProperties(list);
 

Projects/UOContent/Items/Aquarium/VacationWafer.cs

@@ -14,11 +14,11 @@ namespace Server.Items
 
         public override int LabelNumber => 1074431; // An aquarium flake sphere
 
-        public override void AddNameProperties(ObjectPropertyList list)
+        public override void AddNameProperties(IPropertyList list)
         {
             base.AddNameProperties(list);
 
-            list.Add(1074432, VacationDays.ToString()); // Vacation days: ~1_DAYS~
+            list.Add(1074432, $"{VacationDays}"); // Vacation days: ~1_DAYS~
         }
     }
 }

Projects/UOContent/Items/Armor/BaseArmor.cs

@@ -1223,9 +1223,7 @@ namespace Server.Items
             base.OnRemoved(parent);
         }
 
-        private string GetNameString() => Name ?? $"#{LabelNumber}";
-
-        public override void AddNameProperty(ObjectPropertyList list)
+        public override void AddNameProperty(IPropertyList list)
         {
             var oreType = _rawResource switch
             {
@@ -1249,31 +1247,26 @@ namespace Server.Items
                 _                           => 0
             };
 
-            if (_quality == ArmorQuality.Exceptional)
+            var name = Name;
+
+            if (oreType != 0)
             {
-                if (oreType != 0)
-                {
-                    list.Add(1053100, "#{0}\t{1}", oreType, GetNameString()); // exceptional ~1_oretype~ ~2_armortype~
-                }
-                else
-                {
-                    list.Add(1050040, GetNameString()); // exceptional ~1_ITEMNAME~
-                }
+                list.Add(
+                    _quality == ArmorQuality.Exceptional ? 1053100 : 1053099,
+                    name != null ? $"#{oreType}\t{Name}" : $"#{oreType}\t#{LabelNumber}"
+                );
+            }
+            else if (_quality == ArmorQuality.Exceptional)
+            {
+                list.Add(1050040, name ?? $"#{LabelNumber}"); // exceptional ~1_ITEMNAME~
+            }
+            else if (name == null)
+            {
+                list.Add(LabelNumber);
             }
             else
             {
-                if (oreType != 0)
-                {
-                    list.Add(1053099, "#{0}\t{1}", oreType, GetNameString()); // ~1_oretype~ ~2_armortype~
-                }
-                else if (Name == null)
-                {
-                    list.Add(LabelNumber);
-                }
-                else
-                {
-                    list.Add(Name);
-                }
+                list.Add(Name);
             }
         }
 
@@ -1289,7 +1282,7 @@ namespace Server.Items
 
         public virtual int GetLuckBonus() => CraftResources.GetInfo(_rawResource)?.AttributeInfo?.ArmorLuck ?? 0;
 
-        public override void GetProperties(ObjectPropertyList list)
+        public override void GetProperties(IPropertyList list)
         {
             base.GetProperties(list);
 
@@ -1319,72 +1312,72 @@ namespace Server.Items
 
             if ((prop = ArtifactRarity) > 0)
             {
-                list.Add(1061078, prop.ToString()); // artifact rarity ~1_val~
+                list.Add(1061078, $"{prop}"); // artifact rarity ~1_val~
             }
 
             if ((prop = Attributes.WeaponDamage) != 0)
             {
-                list.Add(1060401, prop.ToString()); // damage increase ~1_val~%
+                list.Add(1060401, $"{prop}"); // damage increase ~1_val~%
             }
 
             if ((prop = Attributes.DefendChance) != 0)
             {
-                list.Add(1060408, prop.ToString()); // defense chance increase ~1_val~%
+                list.Add(1060408, $"{prop}"); // defense chance increase ~1_val~%
             }
 
             if ((prop = Attributes.BonusDex) != 0)
             {
-                list.Add(1060409, prop.ToString()); // dexterity bonus ~1_val~
+                list.Add(1060409, $"{prop}"); // dexterity bonus ~1_val~
             }
 
             if ((prop = Attributes.EnhancePotions) != 0)
             {
-                list.Add(1060411, prop.ToString()); // enhance potions ~1_val~%
+                list.Add(1060411, $"{prop}"); // enhance potions ~1_val~%
             }
 
             if ((prop = Attributes.CastRecovery) != 0)
             {
-                list.Add(1060412, prop.ToString()); // faster cast recovery ~1_val~
+                list.Add(1060412, $"{prop}"); // faster cast recovery ~1_val~
             }
 
             if ((prop = Attributes.CastSpeed) != 0)
             {
-                list.Add(1060413, prop.ToString()); // faster casting ~1_val~
+                list.Add(1060413, $"{prop}"); // faster casting ~1_val~
             }
 
             if ((prop = Attributes.AttackChance) != 0)
             {
-                list.Add(1060415, prop.ToString()); // hit chance increase ~1_val~%
+                list.Add(1060415, $"{prop}"); // hit chance increase ~1_val~%
             }
 
             if ((prop = Attributes.BonusHits) != 0)
             {
-                list.Add(1060431, prop.ToString()); // hit point increase ~1_val~
+                list.Add(1060431, $"{prop}"); // hit point increase ~1_val~
             }
 
             if ((prop = Attributes.BonusInt) != 0)
             {
-                list.Add(1060432, prop.ToString()); // intelligence bonus ~1_val~
+                list.Add(1060432, $"{prop}"); // intelligence bonus ~1_val~
             }
 
             if ((prop = Attributes.LowerManaCost) != 0)
             {
-                list.Add(1060433, prop.ToString()); // lower mana cost ~1_val~%
+                list.Add(1060433, $"{prop}"); // lower mana cost ~1_val~%
             }
 
             if ((prop = Attributes.LowerRegCost) != 0)
             {
-                list.Add(1060434, prop.ToString()); // lower reagent cost ~1_val~%
+                list.Add(1060434, $"{prop}"); // lower reagent cost ~1_val~%
             }
 
             if ((prop = GetLowerStatReq()) != 0)
             {
-                list.Add(1060435, prop.ToString()); // lower requirements ~1_val~%
+                list.Add(1060435, $"{prop}"); // lower requirements ~1_val~%
             }
 
             if ((prop = GetLuckBonus() + Attributes.Luck) != 0)
             {
-                list.Add(1060436, prop.ToString()); // luck ~1_val~
+                list.Add(1060436, $"{prop}"); // luck ~1_val~
             }
 
             if (ArmorAttributes.MageArmor != 0)
@@ -1394,12 +1387,12 @@ namespace Server.Items
 
             if ((prop = Attributes.BonusMana) != 0)
             {
-                list.Add(1060439, prop.ToString()); // mana increase ~1_val~
+                list.Add(1060439, $"{prop}"); // mana increase ~1_val~
             }
 
             if ((prop = Attributes.RegenMana) != 0)
             {
-                list.Add(1060440, prop.ToString()); // mana regeneration ~1_val~
+                list.Add(1060440, $"{prop}"); // mana regeneration ~1_val~
             }
 
             if (Attributes.NightSight != 0)
@@ -1409,22 +1402,22 @@ namespace Server.Items
 
             if ((prop = Attributes.ReflectPhysical) != 0)
             {
-                list.Add(1060442, prop.ToString()); // reflect physical damage ~1_val~%
+                list.Add(1060442, $"{prop}"); // reflect physical damage ~1_val~%
             }
 
             if ((prop = Attributes.RegenStam) != 0)
             {
-                list.Add(1060443, prop.ToString()); // stamina regeneration ~1_val~
+                list.Add(1060443, $"{prop}"); // stamina regeneration ~1_val~
             }
 
             if ((prop = Attributes.RegenHits) != 0)
             {
-                list.Add(1060444, prop.ToString()); // hit point regeneration ~1_val~
+                list.Add(1060444, $"{prop}"); // hit point regeneration ~1_val~
             }
 
             if ((prop = ArmorAttributes.SelfRepair) != 0)
             {
-                list.Add(1060450, prop.ToString()); // self repair ~1_val~
+                list.Add(1060450, $"{prop}"); // self repair ~1_val~
             }
 
             if (Attributes.SpellChanneling != 0)
@@ -1434,44 +1427,44 @@ namespace Server.Items
 
             if ((prop = Attributes.SpellDamage) != 0)
             {
-                list.Add(1060483, prop.ToString()); // spell damage increase ~1_val~%
+                list.Add(1060483, $"{prop}"); // spell damage increase ~1_val~%
             }
 
             if ((prop = Attributes.BonusStam) != 0)
             {
-                list.Add(1060484, prop.ToString()); // stamina increase ~1_val~
+                list.Add(1060484, $"{prop}"); // stamina increase ~1_val~
             }
 
             if ((prop = Attributes.BonusStr) != 0)
             {
-                list.Add(1060485, prop.ToString()); // strength bonus ~1_val~
+                list.Add(1060485, $"{prop}"); // strength bonus ~1_val~
             }
 
             if ((prop = Attributes.WeaponSpeed) != 0)
             {
-                list.Add(1060486, prop.ToString()); // swing speed increase ~1_val~%
+                list.Add(1060486, $"{prop}"); // swing speed increase ~1_val~%
             }
 
             if (Core.ML && (prop = Attributes.IncreasedKarmaLoss) != 0)
             {
-                list.Add(1075210, prop.ToString()); // Increased Karma Loss ~1val~%
+                list.Add(1075210, $"{prop}"); // Increased Karma Loss ~1val~%
             }
 
             AddResistanceProperties(list);
 
             if ((prop = GetDurabilityBonus()) > 0)
             {
-                list.Add(1060410, prop.ToString()); // durability ~1_val~%
+                list.Add(1060410, $"{prop}"); // durability ~1_val~%
             }
 
             if ((prop = ComputeStatReq(StatType.Str)) > 0)
             {
-                list.Add(1061170, prop.ToString()); // strength requirement ~1_val~
+                list.Add(1061170, $"{prop}"); // strength requirement ~1_val~
             }
 
             if (_hitPoints >= 0 && _maxHitPoints > 0)
             {
-                list.Add(1060639, "{0}\t{1}", _hitPoints, _maxHitPoints); // durability ~1_val~ / ~2_val~
+                list.Add(1060639, $"{_hitPoints}\t{_maxHitPoints}"); // durability ~1_val~ / ~2_val~
             }
         }
 

Projects/UOContent/Items/Armor/Glasses/ElvenGlasses.cs

@@ -42,7 +42,7 @@ namespace Server.Items
         [SerializableFieldDefault(0)]
         private AosWeaponAttributes WeaponAttributesDefaultValue() => new(this);
 
-        public override void AppendChildNameProperties(ObjectPropertyList list)
+        public override void AppendChildNameProperties(IPropertyList list)
         {
             base.AppendChildNameProperties(list);
 
@@ -50,77 +50,77 @@ namespace Server.Items
 
             if ((prop = _weaponAttributes.HitColdArea) != 0)
             {
-                list.Add(1060416, prop.ToString()); // hit cold area ~1_val~%
+                list.Add(1060416, $"{prop}"); // hit cold area ~1_val~%
             }
 
             if ((prop = _weaponAttributes.HitDispel) != 0)
             {
-                list.Add(1060417, prop.ToString()); // hit dispel ~1_val~%
+                list.Add(1060417, $"{prop}"); // hit dispel ~1_val~%
             }
 
             if ((prop = _weaponAttributes.HitEnergyArea) != 0)
             {
-                list.Add(1060418, prop.ToString()); // hit energy area ~1_val~%
+                list.Add(1060418, $"{prop}"); // hit energy area ~1_val~%
             }
 
             if ((prop = _weaponAttributes.HitFireArea) != 0)
             {
-                list.Add(1060419, prop.ToString()); // hit fire area ~1_val~%
+                list.Add(1060419, $"{prop}"); // hit fire area ~1_val~%
             }
 
             if ((prop = _weaponAttributes.HitFireball) != 0)
             {
-                list.Add(1060420, prop.ToString()); // hit fireball ~1_val~%
+                list.Add(1060420, $"{prop}"); // hit fireball ~1_val~%
             }
 
             if ((prop = _weaponAttributes.HitHarm) != 0)
             {
-                list.Add(1060421, prop.ToString()); // hit harm ~1_val~%
+                list.Add(1060421, $"{prop}"); // hit harm ~1_val~%
             }
 
             if ((prop = _weaponAttributes.HitLeechHits) != 0)
             {
-                list.Add(1060422, prop.ToString()); // hit life leech ~1_val~%
+                list.Add(1060422, $"{prop}"); // hit life leech ~1_val~%
             }
 
             if ((prop = _weaponAttributes.HitLightning) != 0)
             {
-                list.Add(1060423, prop.ToString()); // hit lightning ~1_val~%
+                list.Add(1060423, $"{prop}"); // hit lightning ~1_val~%
             }
 
             if ((prop = _weaponAttributes.HitLowerAttack) != 0)
             {
-                list.Add(1060424, prop.ToString()); // hit lower attack ~1_val~%
+                list.Add(1060424, $"{prop}"); // hit lower attack ~1_val~%
             }
 
             if ((prop = _weaponAttributes.HitLowerDefend) != 0)
             {
-                list.Add(1060425, prop.ToString()); // hit lower defense ~1_val~%
+                list.Add(1060425, $"{prop}"); // hit lower defense ~1_val~%
             }
 
             if ((prop = _weaponAttributes.HitMagicArrow) != 0)
             {
-                list.Add(1060426, prop.ToString()); // hit magic arrow ~1_val~%
+                list.Add(1060426, $"{prop}"); // hit magic arrow ~1_val~%
             }
 
             if ((prop = _weaponAttributes.HitLeechMana) != 0)
             {
-                list.Add(1060427, prop.ToString()); // hit mana leech ~1_val~%
+                list.Add(1060427, $"{prop}"); // hit mana leech ~1_val~%
             }
 
             if ((prop = _weaponAttributes.HitPhysicalArea) != 0)
             {
-                list.Add(1060428, prop.ToString()); // hit physical area ~1_val~%
+                list.Add(1060428, $"{prop}"); // hit physical area ~1_val~%
             }
 
             if ((prop = _weaponAttributes.HitPoisonArea) != 0)
             {
-                list.Add(1060429, prop.ToString()); // hit poison area ~1_val~%
+                list.Add(1060429, $"{prop}"); // hit poison area ~1_val~%
             }
 
             if ((prop = _weaponAttributes.HitLeechStam) != 0)
             {
-                list.Add(1060430, prop.ToString()); // hit stamina leech ~1_val~%
+                list.Add(1060430, $"{prop}"); // hit stamina leech ~1_val~%
             }
         }
     }

Projects/UOContent/Items/Armor/Leather/LeafGloves.cs

@@ -89,13 +89,13 @@ namespace Server.Items
             }
         }
 
-        public override void GetProperties(ObjectPropertyList list)
+        public override void GetProperties(IPropertyList list)
         {
             base.GetProperties(list);
 
             if (IsArcane)
             {
-                list.Add(1061837, "{0}\t{1}", _curArcaneCharges, _maxArcaneCharges); // arcane charges: ~1_val~ / ~2_val~
+                list.Add(1061837, $"{_curArcaneCharges}\t{_maxArcaneCharges}"); // arcane charges: ~1_val~ / ~2_val~
             }
         }
 

Projects/UOContent/Items/Armor/Leather/LeatherGloves.cs

@@ -88,13 +88,13 @@ namespace Server.Items
             }
         }
 
-        public override void GetProperties(ObjectPropertyList list)
+        public override void GetProperties(IPropertyList list)
         {
             base.GetProperties(list);
 
             if (IsArcane)
             {
-                list.Add(1061837, "{0}\t{1}", _curArcaneCharges, _maxArcaneCharges); // arcane charges: ~1_val~ / ~2_val~
+                list.Add(1061837, $"{_curArcaneCharges}\t{_maxArcaneCharges}"); // arcane charges: ~1_val~ / ~2_val~
             }
         }
 

Projects/UOContent/Items/Books/BaseBook.cs

@@ -174,7 +174,7 @@ namespace Server.Items
             }
         }
 
-        public override void AddNameProperty(ObjectPropertyList list)
+        public override void AddNameProperty(IPropertyList list)
         {
             if (!string.IsNullOrEmpty(_title))
             {

Projects/UOContent/Items/Books/Defined/FropozJournal.cs

@@ -137,7 +137,7 @@ namespace Server.Items
 
         public override BookContent DefaultContent => Content;
 
-        public override void AddNameProperty(ObjectPropertyList list)
+        public override void AddNameProperty(IPropertyList list)
         {
             list.Add("Fropoz's Journal");
         }

Projects/UOContent/Items/Books/Defined/KaburJournal.cs

@@ -216,7 +216,7 @@ namespace Server.Items
 
         public override BookContent DefaultContent => Content;
 
-        public override void AddNameProperty(ObjectPropertyList list)
+        public override void AddNameProperty(IPropertyList list)
         {
             list.Add("Khabur's Journal");
         }

Projects/UOContent/Items/Books/Defined/TranslatedGargoyleJournal.cs

@@ -118,7 +118,7 @@ namespace Server.Items
 
         public override BookContent DefaultContent => Content;
 
-        public override void AddNameProperty(ObjectPropertyList list)
+        public override void AddNameProperty(IPropertyList list)
         {
             list.Add("Translated Gargoyle Journal");
         }

Projects/UOContent/Items/Clothing/BaseClothing.cs

@@ -662,9 +662,7 @@ namespace Server.Items
             };
         }
 
-        private string GetNameString() => Name ?? $"#{LabelNumber}";
-
-        public override void AddNameProperty(ObjectPropertyList list)
+        public override void AddNameProperty(IPropertyList list)
         {
             var oreType = _rawResource switch
             {
@@ -688,21 +686,23 @@ namespace Server.Items
                 _                           => 0
             };
 
+            var name = Name;
+
             if (oreType != 0)
             {
-                list.Add(1053099, "#{0}\t{1}", oreType, GetNameString()); // ~1_oretype~ ~2_armortype~
+                list.Add(1053099, name != null ? $"#{oreType}\t{name}" : $"#{oreType}\t#{LabelNumber}"); // ~1_oretype~ ~2_armortype~
             }
-            else if (Name == null)
+            else if (name == null)
             {
                 list.Add(LabelNumber);
             }
             else
             {
-                list.Add(Name);
+                list.Add(name);
             }
         }
 
-        public override void GetProperties(ObjectPropertyList list)
+        public override void GetProperties(IPropertyList list)
         {
             base.GetProperties(list);
 
@@ -737,72 +737,72 @@ namespace Server.Items
 
             if ((prop = ArtifactRarity) > 0)
             {
-                list.Add(1061078, prop.ToString()); // artifact rarity ~1_val~
+                list.Add(1061078, $"{prop}"); // artifact rarity ~1_val~
             }
 
             if ((prop = Attributes.WeaponDamage) != 0)
             {
-                list.Add(1060401, prop.ToString()); // damage increase ~1_val~%
+                list.Add(1060401, $"{prop}"); // damage increase ~1_val~%
             }
 
             if ((prop = Attributes.DefendChance) != 0)
             {
-                list.Add(1060408, prop.ToString()); // defense chance increase ~1_val~%
+                list.Add(1060408, $"{prop}"); // defense chance increase ~1_val~%
             }
 
             if ((prop = Attributes.BonusDex) != 0)
             {
-                list.Add(1060409, prop.ToString()); // dexterity bonus ~1_val~
+                list.Add(1060409, $"{prop}"); // dexterity bonus ~1_val~
             }
 
             if ((prop = Attributes.EnhancePotions) != 0)
             {
-                list.Add(1060411, prop.ToString()); // enhance potions ~1_val~%
+                list.Add(1060411, $"{prop}"); // enhance potions ~1_val~%
             }
 
             if ((prop = Attributes.CastRecovery) != 0)
             {
-                list.Add(1060412, prop.ToString()); // faster cast recovery ~1_val~
+                list.Add(1060412, $"{prop}"); // faster cast recovery ~1_val~
             }
 
             if ((prop = Attributes.CastSpeed) != 0)
             {
-                list.Add(1060413, prop.ToString()); // faster casting ~1_val~
+                list.Add(1060413, $"{prop}"); // faster casting ~1_val~
             }
 
             if ((prop = Attributes.AttackChance) != 0)
             {
-                list.Add(1060415, prop.ToString()); // hit chance increase ~1_val~%
+                list.Add(1060415, $"{prop}"); // hit chance increase ~1_val~%
             }
 
             if ((prop = Attributes.BonusHits) != 0)
             {
-                list.Add(1060431, prop.ToString()); // hit point increase ~1_val~
+                list.Add(1060431, $"{prop}"); // hit point increase ~1_val~
             }
 
             if ((prop = Attributes.BonusInt) != 0)
             {
-                list.Add(1060432, prop.ToString()); // intelligence bonus ~1_val~
+                list.Add(1060432, $"{prop}"); // intelligence bonus ~1_val~
             }
 
             if ((prop = Attributes.LowerManaCost) != 0)
             {
-                list.Add(1060433, prop.ToString()); // lower mana cost ~1_val~%
+                list.Add(1060433, $"{prop}"); // lower mana cost ~1_val~%
             }
 
             if ((prop = Attributes.LowerRegCost) != 0)
             {
-                list.Add(1060434, prop.ToString()); // lower reagent cost ~1_val~%
+                list.Add(1060434, $"{prop}"); // lower reagent cost ~1_val~%
             }
 
             if ((prop = ClothingAttributes.LowerStatReq) != 0)
             {
-                list.Add(1060435, prop.ToString()); // lower requirements ~1_val~%
+                list.Add(1060435, $"{prop}"); // lower requirements ~1_val~%
             }
 
             if ((prop = Attributes.Luck) != 0)
             {
-                list.Add(1060436, prop.ToString()); // luck ~1_val~
+                list.Add(1060436, $"{prop}"); // luck ~1_val~
             }
 
             if (ClothingAttributes.MageArmor != 0)
@@ -812,12 +812,12 @@ namespace Server.Items
 
             if ((prop = Attributes.BonusMana) != 0)
             {
-                list.Add(1060439, prop.ToString()); // mana increase ~1_val~
+                list.Add(1060439, $"{prop}"); // mana increase ~1_val~
             }
 
             if ((prop = Attributes.RegenMana) != 0)
             {
-                list.Add(1060440, prop.ToString()); // mana regeneration ~1_val~
+                list.Add(1060440, $"{prop}"); // mana regeneration ~1_val~
             }
 
             if (Attributes.NightSight != 0)
@@ -827,22 +827,22 @@ namespace Server.Items
 
             if ((prop = Attributes.ReflectPhysical) != 0)
             {
-                list.Add(1060442, prop.ToString()); // reflect physical damage ~1_val~%
+                list.Add(1060442, $"{prop}"); // reflect physical damage ~1_val~%
             }
 
             if ((prop = Attributes.RegenStam) != 0)
             {
-                list.Add(1060443, prop.ToString()); // stamina regeneration ~1_val~
+                list.Add(1060443, $"{prop}"); // stamina regeneration ~1_val~
             }
 
             if ((prop = Attributes.RegenHits) != 0)
             {
-                list.Add(1060444, prop.ToString()); // hit point regeneration ~1_val~
+                list.Add(1060444, $"{prop}"); // hit point regeneration ~1_val~
             }
 
             if ((prop = ClothingAttributes.SelfRepair) != 0)
             {
-                list.Add(1060450, prop.ToString()); // self repair ~1_val~
+                list.Add(1060450, $"{prop}"); // self repair ~1_val~
             }
 
             if (Attributes.SpellChanneling != 0)
@@ -852,44 +852,44 @@ namespace Server.Items
 
             if ((prop = Attributes.SpellDamage) != 0)
             {
-                list.Add(1060483, prop.ToString()); // spell damage increase ~1_val~%
+                list.Add(1060483, $"{prop}"); // spell damage increase ~1_val~%
             }
 
             if ((prop = Attributes.BonusStam) != 0)
             {
-                list.Add(1060484, prop.ToString()); // stamina increase ~1_val~
+                list.Add(1060484, $"{prop}"); // stamina increase ~1_val~
             }
 
             if ((prop = Attributes.BonusStr) != 0)
             {
-                list.Add(1060485, prop.ToString()); // strength bonus ~1_val~
+                list.Add(1060485, $"{prop}"); // strength bonus ~1_val~
             }
 
             if ((prop = Attributes.WeaponSpeed) != 0)
             {
-                list.Add(1060486, prop.ToString()); // swing speed increase ~1_val~%
+                list.Add(1060486, $"{prop}"); // swing speed increase ~1_val~%
             }
 
             if (Core.ML && (prop = Attributes.IncreasedKarmaLoss) != 0)
             {
-                list.Add(1075210, prop.ToString()); // Increased Karma Loss ~1val~%
+                list.Add(1075210, $"{prop}"); // Increased Karma Loss ~1val~%
             }
 
             AddResistanceProperties(list);
 
             if ((prop = ClothingAttributes.DurabilityBonus) > 0)
             {
-                list.Add(1060410, prop.ToString()); // durability ~1_val~%
+                list.Add(1060410, $"{prop}"); // durability ~1_val~%
             }
 
             if ((prop = ComputeStatReq(StatType.Str)) > 0)
             {
-                list.Add(1061170, prop.ToString()); // strength requirement ~1_val~
+                list.Add(1061170, $"{prop}"); // strength requirement ~1_val~
             }
 
             if (_hitPoints >= 0 && _maxHitPoints > 0)
             {
-                list.Add(1060639, "{0}\t{1}", _hitPoints, _maxHitPoints); // durability ~1_val~ / ~2_val~
+                list.Add(1060639, $"{_hitPoints}\t{_maxHitPoints}"); // durability ~1_val~ / ~2_val~
             }
         }
 

Projects/UOContent/Items/Clothing/Cloaks.cs

@@ -80,13 +80,13 @@ namespace Server.Items
             }
         }
 
-        public override void GetProperties(ObjectPropertyList list)
+        public override void GetProperties(IPropertyList list)
         {
             base.GetProperties(list);
 
             if (IsArcane)
             {
-                list.Add(1061837, "{0}\t{1}", _curArcaneCharges, _maxArcaneCharges); // arcane charges: ~1_val~ / ~2_val~
+                list.Add(1061837, $"{_curArcaneCharges}\t{_maxArcaneCharges}"); // arcane charges: ~1_val~ / ~2_val~
             }
         }
 
@@ -163,7 +163,7 @@ namespace Server.Items
             return false;
         }
 
-        public override void GetProperties(ObjectPropertyList list)
+        public override void GetProperties(IPropertyList list)
         {
             base.GetProperties(list);
 

Projects/UOContent/Items/Clothing/Hats.cs

@@ -28,7 +28,7 @@ namespace Server.Items
             }
         }
 
-        public override void AddNameProperties(ObjectPropertyList list)
+        public override void AddNameProperties(IPropertyList list)
         {
             base.AddNameProperties(list);
 

Projects/UOContent/Items/Clothing/OuterTorso.cs

@@ -193,7 +193,7 @@ namespace Server.Items
             return false;
         }
 
-        public override void GetProperties(ObjectPropertyList list)
+        public override void GetProperties(IPropertyList list)
         {
             base.GetProperties(list);
 
@@ -275,7 +275,7 @@ namespace Server.Items
             return false;
         }
 
-        public override void GetProperties(ObjectPropertyList list)
+        public override void GetProperties(IPropertyList list)
         {
             base.GetProperties(list);
 
@@ -374,13 +374,13 @@ namespace Server.Items
             }
         }
 
-        public override void GetProperties(ObjectPropertyList list)
+        public override void GetProperties(IPropertyList list)
         {
             base.GetProperties(list);
 
             if (IsArcane)
             {
-                list.Add(1061837, "{0}\t{1}", _curArcaneCharges, _maxArcaneCharges); // arcane charges: ~1_val~ / ~2_val~
+                list.Add(1061837, $"{_curArcaneCharges}\t{_maxArcaneCharges}"); // arcane charges: ~1_val~ / ~2_val~
             }
         }
 

Projects/UOContent/Items/Clothing/Shoes.cs

@@ -120,13 +120,13 @@ namespace Server.Items
             }
         }
 
-        public override void GetProperties(ObjectPropertyList list)
+        public override void GetProperties(IPropertyList list)
         {
             base.GetProperties(list);
 
             if (IsArcane)
             {
-                list.Add(1061837, "{0}\t{1}", _curArcaneCharges, _maxArcaneCharges); // arcane charges: ~1_val~ / ~2_val~
+                list.Add(1061837, $"{_curArcaneCharges}\t{_maxArcaneCharges}"); // arcane charges: ~1_val~ / ~2_val~
             }
         }
 

Projects/UOContent/Items/Construction/Signs/SubtextSign.cs

@@ -40,7 +40,7 @@ namespace Server.Items
             }
         }
 
-        public override void AddNameProperties(ObjectPropertyList list)
+        public override void AddNameProperties(IPropertyList list)
         {
             base.AddNameProperties(list);
 

Projects/UOContent/Items/Containers/Container.cs

@@ -172,7 +172,7 @@ public partial class CreatureBackpack : Backpack // Used on BaseCreature
         Weight = 3.0;
     }
 
-    public override void AddNameProperty(ObjectPropertyList list)
+    public override void AddNameProperty(IPropertyList list)
     {
         if (Name != null)
         {

Projects/UOContent/Items/Containers/LockableContainer.cs

@@ -214,7 +214,7 @@ public abstract partial class LockableContainer : TrappableContainer, ILockable,
         base.OnSnoop(from);
     }
 
-    public override void AddNameProperties(ObjectPropertyList list)
+    public override void AddNameProperties(IPropertyList list)
     {
         base.AddNameProperties(list);
 

Projects/UOContent/Items/Containers/ParagonChest.cs

@@ -35,7 +35,7 @@ public partial class ParagonChest : LockableContainer
         LabelTo(from, 1063449, _name);
     }
 
-    public override void GetProperties(ObjectPropertyList list)
+    public override void GetProperties(IPropertyList list)
     {
         base.GetProperties(list);
 

Projects/UOContent/Items/Containers/Strongbox.cs

@@ -59,7 +59,7 @@ public partial class StrongBox : BaseContainer, IChoppable
         }
     }
 
-    public override void AddNameProperty(ObjectPropertyList list)
+    public override void AddNameProperty(IPropertyList list)
     {
         if (_owner != null)
         {