Most of the code I've written in .NET to make REST calls have been synchronous. Since Silverlight on Windows Phone only supports Async WebClient and HttpWebRequest calls, I was wondering what a good async pattern is for a Class that exposes methods that make REST calls.

For example, I have an app that needs to do the following.

1. Login and get token
2. Using token from #1, get a list of albums
3. Using token from #1 get a list of categories
4. etc

my class exposes a few methods:

1. Login()
2. GetAlbums()
3. GetCategories()

since each method needs to call WebClient using Async calls what I need to do is essentially block calling Login till it returns so that I can call GetAlbums().

What is a good way to go about this in my class that exposes those methods?