BoxDiagrams.TextBox.GetClearTextAction C# (CSharp) Method

		public override DoOrUndo GetClearTextAction() {
			string old = null;
			if (string.IsNullOrEmpty(Text))
				return null;
			return @do => {
				if (@do) {
					old = Text; Text = null;
				} else {
					Text = old;
				}
			};
		}
	}