Question No 31(MessageBox)

Ex 31.    Read an integer value from a textbox (txtValue). Use the TryParse to read the value. Display error message when the value is not valid.

        private void btbCheck_Click(object sender, EventArgs e)
        {
            int value;
            if (int.TryParse(textBox.Text, out value))
                MessageBox.Show("Valid Input");
            else
                MessageBox.Show("Invalid Input");
        }
    }
}