partial void DeleteSalesDistrict3(SalesDistrict3 instance);
 partial void InsertSalesDistrict3(SalesDistrict3 instance);
 partial void UpdateSalesDistrict3(SalesDistrict3 instance);
		private void detach_SalesDistrict3s(SalesDistrict3 entity)
		{
			this.SendPropertyChanging();
			entity.SalesDistrict2 = null;
		}