In an article by Eric Lippert, which is most likely the source of this , he discusses the use of C # as a scripting language. And, Roslyn CTP includes an interactive C # window and a C # scripting engine.
C # Interactive uses a slightly different version of C #. For example, you do not always need semicolons, and you can use top-level methods and top-level instructions. And you can also use import of a static class:
> using System.Math; > Abs(-5) 5
Because of this, I think that static import of classes (along with the other scripty functions I described) will not be included in the regular version of C #, but you can use them in C # scripts.
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