private void detach_DeptRetDets(DeptRetDet entity)
 {
     this.SendPropertyChanging("DeptRetDets");
     entity.DeptRet = null;
 }
 partial void UpdateDeptRetDet(DeptRetDet instance);
 partial void DeleteDeptRetDet(DeptRetDet instance);
 partial void InsertDeptRetDet(DeptRetDet instance);