Is the C# compiler free? [closed]

Question

I'm joining the Facebook Hacker's Cup. The rules say you can use any language with a free compiler; is C#'s free? I think so, but want to make sure...

I use Visual Studio Ultimate (licensed from my school which is not free) and I would like to avoid having to learn a new language 1 week before the competition...

Answer 1

Yes, Visual Studio Express comes with compiler that is free. Mono is another C# compiler that is free.

Answer 2

Yes. The C# Compiler is part of the Microsoft Windows SDK for Windows 7 and .NET Framework 4. You can download it, for free, here:

Microsoft Windows SDK for Windows 7 and .NET Framework 4

Choosing an IDE is another story. If the rules allow you to use your copy of Visual Studio Ultimate, then awesome. If not, you'll have to find something else. One of the Visual Studio Express versions might suit your needs.

If not, check out MonoDevelop.