这个怎么解决啊 大侠们帮帮忙
    Custom custom = new Custom();    custom.Address = "TianJin";    custom.Email = "[email protected]";    custom.Phone = "022-24096356";    custom.Post = "300192";        //错误消息数    int expectedError = 1;     Assert.IsFalse(custom.IsValid());    Assert.AreEqual(expectedError,custom.ValidationErrorMessages.Length);
结果assert下面出现红线