protected void DeleteField()
 {
     try
     {
         Colleges colleges = new Colleges();
         colleges.FieldID = Convert.ToInt32(ddl_DeleteField.SelectedValue);
         college          = new College();
         if (college.DeleteField(colleges) == true)
         {
             lbl_DeleteField.Text = "Successful delete New Subject....";
         }
     }
     catch (Exception ex)
     {
         lbl_DeleteField.Text = ex.Message;
     }
 }