private void backBtn_Click(object sender, EventArgs e)
{
EnterDonar1 zmx = new EnterDonar1();
this.Hide();
zmx.Show();
}
private void LoginButton_Click(object sender, EventArgs e)
{
// EnterDonar1
EnterDonar1 vx = new EnterDonar1();
vx.Show();
this.Hide();
}