Mono 2.0 Use .NET out of Windows

Since .NET assemblies compile down to CIL bytecode that's executed in a virtual machine under Windows, there's no reason, in principle, that they shouldn't be able to run under any platform. After all, Java's "write once, run anywhere" mantra has the same fundamental architecture: a VM running bytecode that taps into a series of standard APIs and classes.

Visit the Mono Project Official Release Notes.