When the first draft of the C# 2.0 spec was released, the Mono team started working on it immediately. The first draft of the C# 3.0 spec has now been out for almost a year, but the Mono team has just started to work on it. There are two reasons for this: one is that the whole team was working on the major 1.2 release, including Winforms. The second reason is that the first draft of the C# 3.0 spec was released shortly after the official release of C# 2.0, and the Mono team was still busy fixing bugs, cleaning up code, and integrating last-minute changes to the C# 2.0 spec. Because a lot of C# 3.0 relies heavily on the new C# 2.0 features, the mono team also wanted to get C# 2.0 refactored and on a solid footing before beginning work on C# 3.0.