partial void DeleteChatRoom(ChatRoom instance);
 partial void UpdateChatRoom(ChatRoom instance);
		private void detach_ChatRoom(ChatRoom entity)
		{
			this.SendPropertyChanging();
			entity.ChatConfig = null;
		}
 partial void InsertChatRoom(ChatRoom instance);
		private void attach_ChatRoom(ChatRoom entity)
		{
			this.SendPropertyChanging();
			entity.ChatConfig = this;
		}