gistfile1.cs

	public class LastReturned {

		Dictionary<Thread, object> Returned = new Dictionary<Thread, object>(); 


		public object Ret(object o) {

			if (o != null) {
				if (Returned.ContainsKey (Thread.CurrentThread)) {
					Returned [Thread.CurrentThread] = o; 
				} else {
					Returned.Add (Thread.CurrentThread, o); 
				}
			} else {
				Returned.Remove (Thread.CurrentThread); 
			}

			return o; 
		}

		public bool RetBool(bool b) {
			Ret (b); 
			return b; 
		}

		public int RetInt(int b) {
			Ret (b); 
			return b;
		}
		public string RetString(string b) {
			Ret (b); 
			return b; 
		}

		public object Ret() {
			return Returned.ContainsKey (Thread.CurrentThread) ? Returned[Thread.CurrentThread] : null; 
		}

		public bool RetBool() {
			var o = Ret (); 
			return o != null && o is bool ? (bool)o : default(bool); 
		}

		public int RetInt() {
			var o = Ret (); 
			return o != null &&o is int ? (int)o : default(int); 
		}

		public string RetString() {
			var o = Ret (); 
			return o != null &&o is string ? (string)o : default(string);
		}
	}