创建TestDecoratorAttribute的子类，并重写Initialize()方法以检查IsDBOnline，如果为false则调用Assert.Inconclusive().

Create a subclass of TestDecoratorAttribute and override the Initialize() method to check IsDBOnline and call Assert.Inconclusive() if false.

获得类似效果的另一种方法是在使用Db的测试中添加[Category]属性，然后在生产环境中运行测试时将其过滤掉.

Another way to achieve a similar effect is to add a [Category] attribute to the tests that use the Db and then filter them out when running the tests on production.