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/Misc/NameVerification.cs

@@ -2,7 +2,7 @@ using System;
 
 namespace Server.Misc
 {
-    public class NameVerification
+    public static class NameVerification
     {
         public static readonly char[] SpaceDashPeriodQuote =
         {
@@ -105,8 +105,7 @@ namespace Server.Misc
             CommandSystem.Register("ValidateName", AccessLevel.Administrator, ValidateName_OnCommand);
         }
 
-        [Usage("ValidateName")]
-        [Description("Checks the result of NameValidation on the specified name.")]
+        [Usage("ValidateName"), Description("Checks the result of NameValidation on the specified name.")]
         public static void ValidateName_OnCommand(CommandEventArgs e)
         {
             if (Validate(e.ArgString, 2, 16, true, false, true, 1, SpaceDashPeriodQuote))
@@ -236,7 +235,7 @@ namespace Server.Misc
 
             for (var i = 0; i < startDisallowed.Length; ++i)
             {
-                if (name.StartsWith(startDisallowed[i]))
+                if (name.StartsWith(startDisallowed[i], StringComparison.Ordinal))
                 {
                     return false;
                 }