Cleanup & Fixes for .NET 5 (#309)

- [X] Fixes several bugs
- [X] Updates more ordinal issues
- [X] Cleans up the code a bit
- [X] Turns classes static that should have been
- [X] Changes TcpServer.Instances to a HashSet

Bumps release version

Projects/UOContent/Items/Food/Cooking.cs

@@ -3,21 +3,6 @@ using Server.Targeting;
 
 namespace Server.Items
 {
-    public class UtilityItem
-    {
-        public static int RandomChoice(int itemID1, int itemID2)
-        {
-            var iRet = Utility.Random(2) switch
-            {
-                0 => itemID1,
-                1 => itemID2,
-                _ => itemID1
-            };
-
-            return iRet;
-        }
-    }
-
     // ********** Dough **********
     public class Dough : Item
     {
@@ -230,7 +215,7 @@ namespace Server.Items
         {
           if (!Movable)
             return;
-    
+
           from.Target = new InternalTarget( this );
         }*/
 
@@ -324,51 +309,51 @@ namespace Server.Items
       {
         Weight = 1.0;
       }
-  
+
       public PitcherWater( Serial serial ) : base( serial )
       {
       }
-  
+
       public override void Serialize( GenericWriter writer )
       {
         base.Serialize( writer );
-  
+
         writer.Write( (int) 0 ); // version
       }
-  
+
       public override void Deserialize( GenericReader reader )
       {
         base.Deserialize( reader );
-  
+
         int version = reader.ReadInt();
       }
-  
+
       public override void OnDoubleClick( Mobile from )
       {
         if (!Movable)
           return;
-  
+
         from.Target = new InternalTarget( this );
       }
-  
+
       private class InternalTarget : Target
       {
         private PitcherWater m_Item;
-  
+
         public InternalTarget( PitcherWater item ) : base( 1, false, TargetFlags.None )
         {
           m_Item = item;
         }
-  
+
         protected override void OnTarget( Mobile from, object targeted )
         {
           if (m_Item.Deleted ) return;
-  
+
           if (targeted is BowlFlour)
           {
             m_Item.Delete();
             ((BowlFlour)targeted).Delete();
-  
+
             from.AddToBackpack( new Dough() );
             from.AddToBackpack( new WoodenBowl() );
           }