private void metroTileItem1_Click(object sender, EventArgs e)
{
Login frm = new Login();
frm.MdiParent = this.ParentForm;
this.Close();
frm.Show();
}
private void button2_Click(object sender, EventArgs e)
{
this.DialogResult = DialogResult.Retry;
Login frm = new Login();
frm.MdiParent = this.ParentForm;
this.Close();
frm.Show();
}