private void metroTextBox10_TextChanged(object sender, EventArgs e)
{
string nationality = metroTextBox10.Text;
if (ValidateExam.isLetter(nationality))
{
errorProvider4.SetError(metroTextBox10, "Can contain only letters");
}
else
{
errorProvider4.Clear();
}
}
private void metroTextBox3_TextChanged(object sender, EventArgs e)
{
string lname = metroTextBox3.Text;
if (ValidateExam.isLetter(lname))
{
errorProvider3.SetError(metroTextBox3, "Can contain only letters");
}
else
{
errorProvider3.Clear();
}
}
