C# 9 Cleanup (#325)

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

Projects/Server/Mobiles/AggressorInfo.cs

@@ -7,7 +7,7 @@ namespace Server
 {
     public class AggressorInfo
     {
-        private static readonly Queue<AggressorInfo> m_Pool = new Queue<AggressorInfo>();
+        private static readonly Queue<AggressorInfo> m_Pool = new();
         private Mobile m_Attacker, m_Defender;
         private bool m_CanReportMurder;
         private bool m_CriminalAggression;

Projects/Server/Mobiles/Body.cs

@@ -126,7 +126,7 @@ namespace Server
 
         public static implicit operator int(Body a) => a.BodyID;
 
-        public static implicit operator Body(int a) => new Body(a);
+        public static implicit operator Body(int a) => new(a);
 
         public override string ToString() => $"0x{BodyID:X}";
 

Projects/Server/Mobiles/Mobile.cs

@@ -3611,7 +3611,7 @@ namespace Server
             Resistances[3] += BasePoisonResistance;
             Resistances[4] += BaseEnergyResistance;
 
-            for (var i = 0; ResistanceMods != null && i < ResistanceMods.Count; ++i)
+            for (var i = 0; i < ResistanceMods?.Count; ++i)
             {
                 var mod = ResistanceMods[i];
                 var v = (int)mod.Type;