partial void DeleteMotherBoard(MotherBoard instance);
 partial void UpdateMotherBoard(MotherBoard instance);
		private void detach_MotherBoard(MotherBoard entity)
		{
			this.SendPropertyChanging();
			entity.PC = null;
		}
 partial void InsertMotherBoard(MotherBoard instance);
		private void attach_MotherBoard(MotherBoard entity)
		{
			this.SendPropertyChanging();
			entity.PC = this;
		}