partial void DeleteFriend(Friend instance);
 partial void UpdateFriend(Friend instance);
		private void detach_Friends1(Friend entity)
		{
			this.SendPropertyChanging();
			entity.Contact1 = null;
		}
 partial void InsertFriend(Friend instance);
		private void attach_Friends1(Friend entity)
		{
			this.SendPropertyChanging();
			entity.Contact1 = this;
		}