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/Containers/Container.cs

@@ -597,8 +597,7 @@ namespace Server.Items
         }
     }
 
-    [Furniture]
-    [Flippable(0x9AA, 0xE7D)]
+    [Furniture, Flippable(0x9AA, 0xE7D)]
     public class WoodenBox : LockableContainer
     {
         [Constructible]
@@ -623,8 +622,7 @@ namespace Server.Items
         }
     }
 
-    [Furniture]
-    [Flippable(0x9A9, 0xE7E)]
+    [Furniture, Flippable(0x9A9, 0xE7E)]
     public class SmallCrate : LockableContainer
     {
         [Constructible]
@@ -654,8 +652,7 @@ namespace Server.Items
         }
     }
 
-    [Furniture]
-    [Flippable(0xE3F, 0xE3E)]
+    [Furniture, Flippable(0xE3F, 0xE3E)]
     public class MediumCrate : LockableContainer
     {
         [Constructible]
@@ -685,8 +682,7 @@ namespace Server.Items
         }
     }
 
-    [Furniture]
-    [Flippable(0xE3D, 0xE3C)]
+    [Furniture, Flippable(0xE3D, 0xE3C)]
     public class LargeCrate : LockableContainer
     {
         [Constructible]
@@ -716,8 +712,7 @@ namespace Server.Items
         }
     }
 
-    [DynamicFliping]
-    [Flippable(0x9A8, 0xE80)]
+    [DynamicFliping, Flippable(0x9A8, 0xE80)]
     public class MetalBox : LockableContainer
     {
         [Constructible]
@@ -749,8 +744,7 @@ namespace Server.Items
         }
     }
 
-    [DynamicFliping]
-    [Flippable(0x9AB, 0xE7C)]
+    [DynamicFliping, Flippable(0x9AB, 0xE7C)]
     public class MetalChest : LockableContainer
     {
         [Constructible]
@@ -782,8 +776,7 @@ namespace Server.Items
         }
     }
 
-    [DynamicFliping]
-    [Flippable(0xE41, 0xE40)]
+    [DynamicFliping, Flippable(0xE41, 0xE40)]
     public class MetalGoldenChest : LockableContainer
     {
         [Constructible]
@@ -815,8 +808,7 @@ namespace Server.Items
         }
     }
 
-    [Furniture]
-    [Flippable(0xe43, 0xe42)]
+    [Furniture, Flippable(0xe43, 0xe42)]
     public class WoodenChest : LockableContainer
     {
         [Constructible]
@@ -846,8 +838,7 @@ namespace Server.Items
         }
     }
 
-    [Furniture]
-    [Flippable(0x280B, 0x280C)]
+    [Furniture, Flippable(0x280B, 0x280C)]
     public class PlainWoodenChest : LockableContainer
     {
         [Constructible]
@@ -879,8 +870,7 @@ namespace Server.Items
         }
     }
 
-    [Furniture]
-    [Flippable(0x280D, 0x280E)]
+    [Furniture, Flippable(0x280D, 0x280E)]
     public class OrnateWoodenChest : LockableContainer
     {
         [Constructible]
@@ -912,8 +902,7 @@ namespace Server.Items
         }
     }
 
-    [Furniture]
-    [Flippable(0x280F, 0x2810)]
+    [Furniture, Flippable(0x280F, 0x2810)]
     public class GildedWoodenChest : LockableContainer
     {
         [Constructible]
@@ -945,8 +934,7 @@ namespace Server.Items
         }
     }
 
-    [Furniture]
-    [Flippable(0x2811, 0x2812)]
+    [Furniture, Flippable(0x2811, 0x2812)]
     public class WoodenFootLocker : LockableContainer
     {
         [Constructible]
@@ -981,8 +969,7 @@ namespace Server.Items
         }
     }
 
-    [Furniture]
-    [Flippable(0x2813, 0x2814)]
+    [Furniture, Flippable(0x2813, 0x2814)]
     public class FinishedWoodenChest : LockableContainer
     {
         [Constructible]