C# is 15 years old. F# is 10 years old. It's great that Microsoft is in the process of open sourcing their code. However, it gets a little old when they're held up as some example to follow. Objective C has been open source for a long time. How about, let's hope Apple open sources Swift like they did with Objective C.
How about, let's hope Apple open sources Swift like they did with Objective C
To be honest, don't hold your breath. If you research the history of Objective-C you'll realize that it was in fact the first GPL violator. It's only _because_ of the GPL that Apple was forced to open source it, not the other way around.
I don't see anything about async/await, extension methods, or lambdas. C# has quite a few additions since 2006. I would hate to go back to C# 2. C# 5 is the current and C# 6 coming very soon.
I often have to use C# 2.0 because that's the version that the SQL Server 2005 CLR understands. It turns out not to be so bad since you still have closures (in the form of anonymous delegates), generics, and user-defined operators.
Generics and user-defined conversion operators are powerful enough to nicely simulate Haskell's type classes (or Scala's traits), which, in my opinion, is a bigger deal than higher-order functions and 3.0+'s version of “type inferencing”.
