我们可以在数据集设计器(DataSet Designer)中看到已经存在的字段级验证，从某个DataTable中选择一个字段，然后在属性窗口中就可以找到了。

To see the existing field-level validation automatically provided, go to the DataSet Designer, select a field from one of the DataTables and then go to the Properties window.

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如果你想要看到响应式设计在工作，只是改变非常的浏览器窗口的宽度，你正在读这篇文章上(如果你在桌面)。

If you want to see responsive design at work, just change the width of the very browser window you're reading this post on (if you're on a desktop).

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作为提醒，“设计页”应该打开浏览器在单独使用的互动窗口，在办理这些笔记。

As a reminder, the "design page" should be opened in a separate browser window and used interactively while going through these notes.

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