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Asked: 2026-05-17T14:52:44+00:00

I have an annoyance, not really a problem. In my ASP.Net 4.0 app, when

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I have an annoyance, not really a problem. In my ASP.Net 4.0 app, when I compile I get some errors of the type “Validation (CSS 2.1)”. These fill up my Error List but yet the build still succeeds.

So two questions:
1. Why does my build succeed if it lists errors? If it truly is a successful build, why are these errors reported as Warnings of Messages?

  1. Where can I configure how my ASP.Net compiler chooses what and how to validate certain things? When I right-click on my ASP.Net project and go to Project Properties, I don’t see any place where I can fine-tune my compiler’s options for build errors etc.

Thanks
Mark

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1 Answer

  1. Editorial Team

    New Wrinkle Found And Explained

    Well, I have some new related info on this topic. For a week the problem/annoyance when away and I was baffled as to why. But then as quickly as the messsages went away they returned.

    I figured out this new oddity. It seems that the VS2010 build process (F5/F6) only analyzes *.css files when they’re open in the editor! When I run the build without any *.css files open the errors vanish.

    Old Problem Still There

    The error display problem is still happening. Hopefully you can duplicate it by creating a new *.css file with something like this in it (I happen to know that the css validator doesn’t like the filter property).

    .ext-el-mask {
    z-index: 100;
    position: absolute;
    top:0;
    left:0;
    -moz-opacity: 0.5;
    opacity: .50;
    filter: alpha(opacity=50);
    width: 100%;
    height: 100%;
    zoom: 1;
    }

    When you hit F5 you’ll get an error in your ErrorList view. This shouldn’t be an “ERROR”!!

    (Sorry, can’t post picture, no reputation yet).

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