private void AgeTB_Validating(object sender, CancelEventArgs e)
{
int age = int.Parse(AgeTB.Text);
if (age < 5 || age > 120 || age == 0)
{
AgeErr.SetError(AgeTB, "Age must be bigger than 4");
e.Cancel = true;
}
}
private void AgeTB_Validated(object sender, EventArgs e)
{
AgeErr.Clear();
}
