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Editorial Team
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Asked: 2026-05-12T11:21:24+00:00

I’m using Visual Studio 2005 on a Windows XP SP3 machine and recently have

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I’m using Visual Studio 2005 on a Windows XP SP3 machine and recently have come accross a some what strange issue.

I have a C# and ASP.NET project that runs fine when on the team test server and using IIS locally on my own machine. However, running it using the in-built Visual Studio ASP.NET Development server it doesn’t seem to serve all the images/scripts/css files all of the time. When I load a page one time images A, B and C will be missing and I may get a system (sub-package) error however loading it again all those images will be there and the sub-package will work but a CSS, a script or any other image file may be missing.

The Windows event application log seems to show occasionally the missing files will be logged but this isn’t consistent either.

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  1. Editorial Team

    It happens to me all the time; I think the reason is that the ASP.NET Develoment server is not a very good HTTP server, and when receiveing too many requests, it drops some ones.

    Since it is also very very slow, I configured vs2008 (you can do that with vs2005, of course) to use ASP.NET for debugging; it works far better that way.

    To do that:

    Project -> properties -> Web (last tab) -> Server. There are three alternatives: Use Visual Studio Development Server; Use local Web IIS; Use custom Web server. Choose the second. (not sure about the exact english names: I have the Italian version of VS).

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