For date fields, you can also specify whether the date should be past or future as used above.
对于日期字段，您还可以指定日期应当是过去还是将来，正如上面使用的。
Gets a value that indicates whether the date represented by an instance of this class is a either Saturday or Sunday.
获取一个值，该值指示由此类的实例表示的日期是否是星期六或星期日。
Gets a value that indicates whether the date represented by an instance of this class is a either Saturday or Sunday.
获取一个值，该值指示由此类的实例表示的日期是否是星期六或星期日。
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