Source for a C# compiler written in pure C#.

So a guy at Microsoft wrote his own C# compiler in C# and is now giving it away.
You can read the details in the link below.

Source for a C# compiler written in pure C#.

Not that I would use such a thing in production...you can already get the real C# compiler for free from Microsoft in the .NET Framework SDK. But it would be interesting to read through the code and see how he did things.