partial void DeleteMedia(Media instance);
 partial void UpdateMedia(Media instance);
		private void detach_Medias(Media entity)
		{
			this.SendPropertyChanging();
			entity.Member = null;
		}
 partial void InsertMedia(Media instance);
		private void attach_Medias(Media entity)
		{
			this.SendPropertyChanging();
			entity.Member = this;
		}