However, it is guaranteed to be loaded and to have its fields initialized and its static constructor called before the class is referenced for the first time in your program.

然而，类别却能保证一定会载入，并会在您的程序第一次参考此类别前，先让其中的栏位初始化，而其中的静态建构函式也受到呼叫。

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Note that demands should never be made in a class constructor because class constructor code is not guaranteed to execute at any particular point or in any particular context.

请注意需求不应该设定于类别建构函式内，因为无法确定类别建构函式程序码的执行时点和内容。

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