Getting Authentication Token from Windows Azure AD using HttpClient

Is there any sample of how to acquire a token from AAD using a simple Http-/WebClient? I was looking at the "Getting Authentication Token from Windows Azure AD for accessing Graph Service" sample at:

http://blogs.msdn.com/b/aadgraphteam/archive/2013/01/24/walk-through-for-building-a-net-application-for-accessing-windows-azure-active-directory-graph-service.aspx

...but I get a response message saying "The requested namespace does not exist." Has anything changed Jan 23rd 2013?

Thanks

Mikael

If this answers your question, please use the "Answer" button to say so... Mikael - http://blogical.se/blogs/mikael