Unable to run Facebook C# SDK samples

I downloaded the latest Facebook C# SDK source along with samples. However when I run any of the sample I get this error:

The web project XXX requires missing web components in order to load. Would you like to downl开发者_C百科oad and install them using Web Platform installer now?

No matter whether I click Yes or No the never loads. Can anybody tell me why is this happening?

It's because when you unpack the zip the samples don't have the references to Facebook and Facebook.Web; you can run the build.cmd in the root of the samples to add these to each sample project automatically, or you can add them manually yourself.