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Editorial Team
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Asked: 2026-05-22T20:47:47+00:00

Folks, I have a an old ASP.Net website that I have to modify occasionally.

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Folks,
I have a an old ASP.Net website that I have to modify occasionally.

When I go to build or run the site, I get

Cannot update project reference ”.
Source project not
available.Validating Web Site

It then steps through each folder and page in the project & "Validates" it. The site is quite sizable, and can take 5+ minutes on my beefy Windows-7 PC.

Anyone any ideas how I can track down the ” project reference and get rid of this? The Validation is breaking my heart, small change, run, wait 5 minutes, test, small change, run wait 5 minutes . . . gag

ASP.Net isn’t my bag so forgive me if this is a school boy error.

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1 Answer

  1. Editorial Team

    Visual Studio 2008 stores project references for Web Sites in the Solution file (.sln)

    Find and edit or remove the offending project references by editing the Solution file with Notepad or Notepad++.

    A typical project entry

    (here the GUID {2F769E88-2909-49A8-A5D6-1AF1C27FAB4E} on the far right is the project’s ID to be referenced by some other project) …

     Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "MyLibrary", "Source\MyServiceLibrary\MyLibrary.csproj", "{2F769E88-2909-49A8-A5D6-1AF1C27FAB4E}"
 EndProject

    A reference to the above project entry from a Web Site

     Project("{E24C65DC-7377-472B-9ABA-BC803B73C61A}") = "WebSite", "Source\WebSite", "{66E258DA-36BE-4643-BC7E-2D9D90A6BEB9}"
    ProjectSection(WebsiteProperties) = preProject
        ...
        ProjectReferences = "{2F769E88-2909-49A8-A5D6-1AF1C27FAB4E}|MyLibrary.dll;"
        ...
    EndProjectSection
 EndProject
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