Mono 2 News Update
Marek Safar has announced that the Mono C# compiler, gmcs, now has full C# 3.0 support. In order to take full advantage of it, you will have to also use the upcoming Mono 2.0 release. This release will include many of the new .NET 3.5 features such as expression trees, which are essential for many LINQ providers.
Todd Montgomery Dec 19, 2014