谁有基于asp.net(c#版)的聊天室源代码或文档（50分全给）

留言版
http://www.asp.net/Forums/Download/download.aspx?tabindex=0&tabid=1
http://www.krfashion.com/guestbook/forum.aspx
http://www.krfashion.com/mall/review/theme.aspx
结合了商城图片评论
http://www.codeproject.com/aspnet/GuestbookLK.asp一个xml的留言簿
看看来...http://www.krfashion.com/mall/review/theme.aspx
有完整例子：
《asp.net website programming problem-design-solution》