来自：http://www.oschina.net/p/netjs?from=20140414
Netjs 是一个 .NET 到 TypeScript 和 JavaScript 的编译器。
该软件目前还有一些限制：
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忽略命名空间
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mscorlib.ts is a tiny subset of the full BCL
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Overloaded methods generally work, but have trouble with:
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One overload being virtual and another not (it hurts my head trying to get this to work)
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Overloads that have the same argument count and accept values that can be null (runtime type checking is used)
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Overloaded constuctors that call different base constructors probably don't work
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Async does not work
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Gotos only sometimes work
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Regexes have some problems:
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Named groups don't work (we rely on the browser's regex implementation)
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Match Group Index only works if you capture everything
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Integer casts with the expectation of performing a Truncate operation don't work ()
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Seriously, watch it with those overloads
