protected void DeleteDepartment()
 {
     try
     {
         Colleges colleges = new Colleges();
         colleges.DepartmentId = Convert.ToInt32(ddl_DeleteDept.SelectedValue);
         college = new College();
         if (college.DeleteDepartment(colleges) == true)
         {
             lbl_ModifyField.Text = "Successful delete New Department....";
         }
     }
     catch (Exception ex)
     {
         lbl_ModifyField.Text = ex.Message;
     }
 }