C# 9 Cleanup (#325)

- [X] Removes EventArgs - not needed
- [X] Merges sequential checks
- [X] Removes redundant type declarations

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

@@ -30,7 +30,7 @@ namespace Server.Factions
 
         public virtual void AssignName(TextDefinition name)
         {
-            if (name != null && name.Number > 0)
+            if (name?.Number > 0)
             {
                 m_LabelNumber = name.Number;
                 Name = null;