private void logoutToolStripMenuItem1_Click(object sender, EventArgs e)
 {
     this.Close();
     FormLogin formLogout = new FormLogin();
     formLogout.Show();
 }
 private void buttonLogout_Click(object sender, EventArgs e)
 {
     FormLogin formLogout = new FormLogin();
     formLogout.Show();
     this.Close();
 }