Use Null-Propagation Operator

OpenRA.Mods.Common/Scripting/CallLuaFunc.cs

@@ -31,8 +31,7 @@ namespace OpenRA.Mods.Common.Activities
 		{
 			try
 			{
-				if (function != null)
-					function.Call().Dispose();
+				function?.Call().Dispose();
 			}
 			catch (Exception ex)
 			{

OpenRA.Mods.Common/Scripting/Global/RadarGlobal.cs

@@ -29,14 +29,7 @@ namespace OpenRA.Mods.Common.Scripting
 		[Desc("Creates a new radar ping that stays for the specified time at the specified WPos.")]
 		public void Ping(Player player, WPos position, Color color, int duration = 30 * 25)
 		{
-			if (radarPings != null)
-			{
-				radarPings.Add(
-					() => player.World.RenderPlayer == player,
-					position,
-					color,
-					duration);
-			}
+			radarPings?.Add(() => player.World.RenderPlayer == player, position, color, duration);
 		}
 	}
 }

OpenRA.Mods.Common/Scripting/LuaScript.cs

@@ -54,8 +54,7 @@ namespace OpenRA.Mods.Common.Scripting
 			if (disposed)
 				return;
 
-			if (context != null)
-				context.Dispose();
+			context?.Dispose();
 
 			disposed = true;
 		}

OpenRA.Mods.Common/Scripting/Properties/GeneralProperties.cs

@@ -172,10 +172,7 @@ namespace OpenRA.Mods.Common.Scripting
 		{
 			get
 			{
-				if (autotarget == null)
-					return null;
-
-				return autotarget.Stance.ToString();
+				return autotarget?.Stance.ToString();
 			}
 
 			set
@@ -197,10 +194,8 @@ namespace OpenRA.Mods.Common.Scripting
 			get
 			{
 				var tooltip = tooltips.FirstEnabledTraitOrDefault();
-				if (tooltip == null)
-					return null;
 
-				return tooltip.Info.Name;
+				return tooltip?.Info.Name;
 			}
 		}