Submited in a comment today. The project looks great. So, we are giving it its own place:
Welcome to the .NET Mass Downloader project. While it’s great that Microsoft has released the .NET Reference Source Code, you can only get it one file at a time while you’re debugging. If you’d like to batch download it for reading or to populate the cache, you’d have to write a program that instantiated and called each method in the Framework Class Library. Fortunately, .NET Mass Downloader comes to the rescue!

http://www.codeplex.com/NetMassDownloader