private void PasswordText_TextChanged(object sender, EventArgs e)
{
if (!(String.IsNullOrEmpty(PasswordText.Text)))
{
if (!(char.IsLetterOrDigit(PasswordText.Text[PasswordText.Text.Length - 1])))
{
MessageBox.Show("Please Enter Number or Letter!", "Notice", MessageBoxButtons.OK);
string newPassword = "";
for (int i = 0; i < PasswordText.Text.Length - 1; ++i)
{
newPassword += PasswordText.Text[i];
}
PasswordText.Text = newPassword;
PasswordText.Select(PasswordText.Text.Length, 0);
}
}
}