domain - user validation

[Dominick Baier]

How do you authenticate the user?

If you are using IIS integrated authentication - IIS will do the authentication
and you will see the username on Context.User.Identity.Name.

This name will have two parts domain\username.

 

[MSWindowsProf]

How do I validate that a user belongs to a particular domain,
programmatically? For example, I have a user (user1) who claims to belong to
a particular domain (domain1). How do I confirm whether user1 belongs to
domain1, in my web application?
Any help is appreciated.
Thanks.