partial void DeletePrinter(Printer instance);
 partial void UpdatePrinter(Printer instance);
		private void detach_Printer(Printer entity)
		{
			this.SendPropertyChanging();
			entity.PC = null;
		}
 partial void InsertPrinter(Printer instance);
		private void attach_Printer(Printer entity)
		{
			this.SendPropertyChanging();
			entity.PC = this;
		}