Add ILVariable.IsDead property

ICSharpCode.Decompiler/IL/ILVariable.cs

@@ -337,6 +337,17 @@ namespace ICSharpCode.Decompiler.IL
 			}
 		}
 
+		/// <summary>
+		/// Gets whether the variable is dead - unused.
+		/// </summary>
+		public bool IsDead {
+			get {
+				return StoreCount == (HasInitialValue ? 1 : 0)
+					&& LoadCount == 0
+					&& AddressCount == 0;
+			}
+		}
+
 		/// <summary>
 		/// The field which was converted to a local variable.
 		/// Set when the variable is from a 'yield return' or 'async' state machine.

ICSharpCode.Decompiler/IL/Instructions/ILVariableCollection.cs

@@ -102,8 +102,7 @@ namespace ICSharpCode.Decompiler.IL
 		{
 			for (int i = 0; i < list.Count;) {
 				var v = list[i];
-				int deadStoreCount = v.HasInitialValue ? 1 : 0;
-				if (v.StoreCount == deadStoreCount && v.LoadCount == 0 && v.AddressCount == 0 && v.Kind != VariableKind.DisplayClassLocal) {
+				if (v.IsDead && v.Kind != VariableKind.DisplayClassLocal) {
 					RemoveAt(i);
 				} else {
 					i++;