private void detach_VanPhongs(VanPhong entity)
		{
			this.SendPropertyChanging();
			entity.TinBai = null;
		}
		private void attach_VanPhongs(VanPhong entity)
		{
			this.SendPropertyChanging();
			entity.TinBai = this;
		}
 partial void UpdateVanPhong(VanPhong instance);
 partial void DeleteVanPhong(VanPhong instance);
 partial void InsertVanPhong(VanPhong instance);