Microsoft has released SDK for Facebook

Microsoft has released a SDK for application development for Facebook. Applications can be created by using Silverlight and Windows Presentation Foundation.

SDK contains sample source code and tools to build applications using ASP.NET, Silverlight, WPF and WinForms. Also ASP.NET MVC is supported. SDK includes APIs and source code, components and controls. The SDK uses the open Facebook API Stream which is a publicly available software interface for Facebook.