Validate numeric textbox using int.tryparse visual C#.NET

You could always run the TryParse on the keyDown event so as to validate as the data gets entered. It saves the user an additional UI interaction.

private void textBox1_KeyDown(object sender, KeyEventArgs e)
        {
            int i;

            string s = string.Empty;

            s += (char)e.KeyValue;

             if (!(int.TryParse(s, out i)))
            {
                e.SuppressKeyPress = true;
                textBox2.Text = "An int, that key press would not create";
            }
            else
            {
                textBox2.Text = "On the path to a great int, you are";
            }             
        }