There are several demo’s online that connect a Windows Store App to Facebook, Twitter, etc. using OAuth 1.x and OAuth 2.0. Although these demo’s show how this works, the code is hard to reuse across applications, because it is tightly coupled to the main app page. I’ve completely rewritten the code to make the code reusable, and to make the OAuth 1.x and OAuth 2.0 interface almost identical, so you can use a single codebase to connect with both protocols. You can download the OAuth demo (71 KB), which includes an OAuth 1.x library you can use in the same manner as with OAuth 2.0.