silverlight app using forms authentication using AD.

http://songhayblog.azurewebsites.net/entry/show/the-silverlight-business-application-project-and-ntlm

When our project working on authentication using Form , but though AD.

I try to find the

ASP.NET 2.0 Active Directory with Forms Authentication

how it work on WCF and sliverlight evn , I found a good article.

to Using windows authentication in  Sliverlight.