Spec# released.

[Julio César Carrascal]

Spec# has been released and I though it should be of interest for the 
group:

http://research.microsoft.com/research/downloads/Details/f96c1618-b332-4106-b0fc-911346d5f537/Details.aspx

Spec# is an experimental language that extends C# with several 
design-by-contract features. The new features of Spec# include a 
non-null type system, method pre- and post-conditions, loop invariants, 
and object invariants. The Spec# Programming System provides design-time 
checking, run-time checking, and a static verifier. This version of 
Spec# runs on .NET Framework version 2.

Particularly interesting for me: The non-null type and Loop invariants.