如果枚举项的值是连续的，方法工作得很好。但是，无论如何，您可以使用字典< DayOfTheWeek，字符串> （其性能较差）。

If the values of your enum items are contigious, the array method works pretty well. However, in any case, you could use Dictionary<DayOfTheWeek, string> (which is less performant, by the way).