The GetAllProducts method returns the entire list of products as an IEnumerable type.

该控制器定义了三个方法，它们或者返回一个单一产品，或一个产品列表。

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We say "partially" because there are several scenarios where one would like to use an interface with a richer API than IEnumerable.

我们之所以说“部分”，是因为在某些情况下，人们应一次性地使用某个具有丰富api的接口，而不是使用IEnumerable接口。

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However, for those scenarios we already encourage people to just take an IEnumerable and special case having the instance implementing ICollection too.

然而，在这些场景下，我们已鼓励人们仅采用IEnumerable接口，而且对于拥有实现了ICollection接口的实例的特殊情况也是如此。

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The IEnumerable function will generally begin with a "Return Iterator" block, which is a special case of VB's new anonymous, multi-line function syntax.

IEnumerabl的函数将通常以一个“ReturnIterator”代码块开始，它是VB新匿名函数、多行函数语法的一种特例。

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Theoretically, the IEnumerable interface could be used to add objects to a collection, but it can't be used in asynchronous operations because it blocks.

理论上来说，IEnumerable接口可对集合添加对象，但是由于它的阻塞性所以不能在异步操作中进行。

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With the addition of IEnumerable support for directory and DirectoryInfo, the first file in the directory can be accessed immediately while the rest of the list is lazily populated.

随着IEnumerable对Directory和DirectoryInfo的额外支持，在目录的第一个文件被即刻访问时，列表的其余文件则可以延迟生成。

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You can also use a foreach loop which will be compiled into a similar code leveraging the IEnumerable interface of the Items Collection. Here is now how the new loop is executed internally.

你也能使用foreach循环语句，它会被编译为类似的代码，其充分利用了Items集合的IEnumerable接口。

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You can also use a foreach loop which will be compiled into a similar code leveraging the IEnumerable interface of the Items Collection. Here is now how the new loop is executed internally.

你也能使用foreach循环语句，它会被编译为类似的代码，其充分利用了Items集合的IEnumerable接口。

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