此循环构造用于循环访问可枚举集合(例如，范围表达式、序列、列表、数组或其他支持枚举的构造)中的模式匹配项。

This looping construct is used to iterate over the matches of a pattern in an enumerable collection such as a range expression, sequence, list, array, or other construct that supports enumeration.

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此循环构造用于循环访问可枚举集合(例如，范围表达式、序列、列表、数组或其他支持枚举的构造)中的模式匹配项。

This looping construct is used to iterate over the matches of a pattern in an enumerable collection such as a range expression, sequence, list, array, or other construct that supports enumeration.

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