ASP.NET Routing, make i possible to route to a .zip file for download

I'm using ASP开发者_如何转开发.NET Routing in my webapp. On my site I have a .zip file that I want to users to be able to download. But I get error saying: "There is no build provider registered for the extension '.zip'. "

What I'm I doing wrong?

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For ASP.NET MVC try using FileContentResult Class msdn link