private void btnDelete_Click(object sender, EventArgs e)
 {
     if (rmid != 0)
     {
         DialogResult result = MessageBox.Show("Are You Sure To Remove Record From Database?", "Movie System", MessageBoxButtons.YesNo, MessageBoxIcon.Warning);
         if (result == DialogResult.Yes)
         {
             string message = "";
             if (operation.DeleteRentedDetails(rmid))
             {
                 message = "Movie Rented Details are Removed from Database";
                 rmid    = 0;
                 LoadDB();
             }
             else
             {
                 message = "There are some failure in removing Movie Rented Details in Database";
             }
             MessageBox.Show(message);
         }
     }
 }