CalculatorTestApp.Page.RunCustomFunction C# (CSharp) Метод

        public void RunCustomFunction(object sender, RoutedEventArgs e)
        {
            try {
                object result = _engine.CallMethod((string)((Button)sender).Tag, (object)Decimal.Parse(Calculator.CurrentNumber.ToString()));
                Calculator.CurrentNumber = new NumberProject.Number(result.ToString());
                Calculator.OnValueChanged();
            } catch (Exception) {
                HtmlPage.Window.Alert("The user-defined function returned None");
            }
        }