Keep this in mind so you don't make the mistake of thinking that all references to a class have been changed to the new interface type.
请记住这一点，不要错误地认为对这个类的所有引用都会被转换为新的接口类型。
You should use typedef to create a new name for a type that will help clarify the interface or save typing.
应该使用typedef创建新的类型名称，这将帮助解释接口或保存输入。
This version allows scripters to take advantage of the new dynamic type, the push-based IObservable interface, the Tuple class, among the many new features in C# 4.0.
凭借该版本，脚本编写者可以利用新的 动态类型、基于推模式的IObservable接口、 Tuple类以及C# 4.0中的众多新特性。
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