Simple calcuator control in WPF

Hi Jegan Priya,

Here is a main logic to develop calculator.

namespace Simple_Sample
{
    ///

    /// Interaction logic for MainWindow.xaml
    ///

    public partial class MainWindow : Window
    {
        public MainWindow()
        {
            InitializeComponent();
        }

        String Operator = String.Empty;
        String Operant = String.Empty;

        bool isNewValue = false ;
        private void TextBox_TextChanged_1(object sender, TextChangedEventArgs e)
        {

        }

        private void Button_Click_1(object sender, RoutedEventArgs e)
        {
            if (isNewValue)
            {
                Operant = this.OperantDisplay.Text;
                this.OperantDisplay.Text = String.Empty;
            }
            this.OperantDisplay.Text += (sender as Button).Content;
            isNewValue = false;
        }

        void ExecuteOperation(String operant1, String operant2, String oper)
        {
            if (oper == "+")
                this.OperantDisplay.Text = (Convert.ToInt16(operant1) + Convert.ToInt16(operant2)).ToString();
            else if (oper == "-")
                this.OperantDisplay.Text = (Convert.ToInt16(operant1) - Convert.ToInt16(operant2)).ToString();
            else if (oper == "*")
                this.OperantDisplay.Text = (Convert.ToInt16(operant1) * Convert.ToInt16(operant2)).ToString();
            else if (oper == "/")
                this.OperantDisplay.Text = (Convert.ToInt16(operant1) / Convert.ToInt16(operant2)).ToString();

        }

        private void Button_Click_2(object sender, RoutedEventArgs e)
        {
            this.OperatorDisplay.Text = (sender as Button).Content.ToString ();
    
            if (Operator != string.Empty && Operant!= string.Empty)
            {
                ExecuteOperation(Operant, this.OperantDisplay.Text, Operator);
            }
            if (this.OperatorDisplay.Text != "=")
            {
                this.Operator = this.OperatorDisplay.Text;
            }
            else
            {
                this.OperatorDisplay.Text = String.Empty;
            }
            isNewValue = true;
        }
    }
}

Regards,
Selva Ganapathy K