title: C#: ASP.NET Web-Messenger (Chat)
body: <p>i programmed a Chat-Program like ICQ with C# and WCF.</p>
  
  <p>Now i want to build a Web-Client-Version with ASP.NET.
  Is this possible? I want that new chatrooms-popup in the window like meebo (or in a new tab).
  I have to use the Client-WebService-Class from my WCF-service, right? But is it possible to react on server-side Events with ASP.NET?
  New messages, new chatroom-invitations, chat events like "user goes online/offline" should be handled dynamically by the site without refresh-actions from the user.</p>
  
  <p>Are there some tutorials?</p>