ContinueManager.Continue

/// <summary>
/// ContinuationManager is used to detect if the most recent activation was due to a
/// authentication continuation.
///
/// Note: To keep this sample as simple as possible, the content of the file was changed
/// to support WebAuthenticationBrokerContinuation ONLY. Take a look in
/// http://msdn.microsoft.com/en-us/library/dn631755.aspx for a full documentation on how
/// to support continuation in other cases.
/// </summary> 
public class ContinuationManager
{
    internal void Continue(IContinuationActivatedEventArgs args)
    {
        switch (args.Kind)
        {
            case ActivationKind.WebAuthenticationBrokerContinuation:
                var page = MainPage.Current as IWebAuthenticationContinuable;
                if (page != null)
                {
                    page.ContinueWebAuthentication(
                        args as WebAuthenticationBrokerContinuationEventArgs);
                }
                break;
        }
    }
}