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?

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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.