private void guna2Button2_Click(object sender, EventArgs e)
 {
     if (id == "")
     {
         MessageBox.Show("Select Message before Delete", "Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
     }
     else
     {
         DBconnection ob = new DBconnection();
         ob.deleteNotify(id);
         display();
     }
 }