What is Connect.RegisterUser in facebook developer toolkit

How can i link my application's account to facebook? This is the code :-

BrowserSession    _browserSession = new BrowserSession(ApplicationKey, new Enums.ExtendedPermissions[] { Enums.ExtendedPermissions.email, Enums.ExtendedPermissions.manage_mailbox, Enums.ExtendedPermissions.read_mailbox,
                Enums.ExtendedPermissions.status_update, Enums.ExtendedPermissions.share_item, Enums.ExtendedPermissions.offline_access});

                Connect connect = new Connect(_browserSession);
                connect.RegisterUsersAsync(List<ConnectAccountMap>);

As you can see connect.RegisterUsersAsync requires List of ConnectAccountMap type. How do i get those ConnectAccountMaps? The properties of ConnectAccountMap are EmailAddress, AccountId and AccountUrl. But how do i get those parameters?

Thanks in advance :)

Finally, i am answering my own question. I did try Facebook C# SDK and didn't get it work. I studied the sample and changed the appId and was even successfull in login in but could not make it to work. This function failed

 [ScriptableMember]
        public void LoggedIn(string uri) //string sessionKey, string sessionSecret, int expires, string userId, string allowedPermissions)
        {
            FacebookAuthenticationResult authResult;
            if (FacebookAuthenticationResult.TryParse(uri, out authResult))
            {
                fbApp.Session = authResult.ToSession();
                loginSucceeded();
            }
            else
            {
                failedLogin();
            }
        }

The line FacebookAuthenticationResult.TryParse kept failing and i was frustrated like anything. Finally i made it work using Facebook Developer Toolkit V3.1 itself.

This query works just fine :-

 _fb.Fql.QueryAsync("SELECT email FROM user WHERE uid=" + u.uid, new Fql.QueryCallback((str, obj, exc) => {

                        Debug.WriteLine(str);

                    }), null); 

Offcourse your application should ask for extended permissions of email. A query is compulsorily needed because in user object of Facebook there is no property which can fetch you the real email address. You can if you want to retrieve proxied_email but most of the case that isn't what you are always looking for and hence the query ! You will get the xml which you can easily parse it using Linq To Xml or traditional Xml c# classes. Cheers!

If you are using Old Facebook Developer Toolkit here is a good example to start with.

http://facebooktoolkit.codeplex.com/Thread/View.aspx?ThreadId=45825

Other wise for new C# SDK consider having a look at

http://facebooksdk.codeplex.com/wikipage?title=Code%20Examples&referringTitle=Documentation

Hope it may help.

And FYI as mentioned here http://developers.facebook.com/docs/reference/rest/connect.registerUsers

connect.register user has been deprecated.