Authenticate Web Users with Azure Active Directory Access Control

I followed the article at http://azure.microsoft.com/en-us/documentation/articles/active-directory-dotnet-how-to-use-access-control/ to the lettre, which successfully executes and displays correctly but it does not indicate how to get specific information from the claim such as the nameidentifier or the email. I tried several syntx to get properties or values for nameidentifier and others but everytime getting a different runtime or compile errors.

Can you provide a snippet of code on how it is possible to extract specific propertie from the claim in the code behind (Homecontroller)

Thanks