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VS2008 - 'Set as startup project' setting dissapearing.

Answer 1

+3 A:

Try to close you solution, delete YourSolution.suo file in solution's root directory and open it again.

abatishchev 2010-05-16 15:42:58

In addition, make sure you have write permission to that file and that there is no cleanup script that deletes that file regularly :)

mihi 2010-05-16 15:56:46

Ok, will try that thanks. There are no cleanup scripts that I know of, and I know of no reason why I shouldn't have permissions on the file - will check.

UpTheCreek 2010-05-16 16:03:02

This worked for a while, but a few days later it was back :/

UpTheCreek 2010-05-26 08:50:49

@UpTheCreek: Sounds pity( Have you instaleld sp1?

abatishchev 2010-05-26 10:37:54

Yes, sp1 is installed. I guess I will just periodically delete this file! By the way, do you know what else is stored in there?

UpTheCreek 2010-05-26 10:55:36

@UpTheCreek: This is a special file to cache user settings like which items are shows in solution explorer and other temp settings. YOu can delete it with not doubt

abatishchev 2010-05-26 11:06:49

Answer 2

+2 A:

This can happen if the projects in the solution do not have unique ids. Each project file has an entry like this:

ProjectGuid = "{36910E05-3D05-4AC0-B90C-94F8F776CE5F}"

If you created your supporting projects by file-copying your startup project, they will still have the same id. The easiest way to check this is to open the solution file with a text editor. You'll know, that you have a problem, if you see two projects with different names, but the same id:

Microsoft Visual Studio Solution File, Format Version 8.00
Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Project1", "Project1.csproj", "{BAC18E5A-710F-4E5A-8DE3-822CE1AA5D38}"
    ProjectSection(ProjectDependencies) = postProject
    EndProjectSection
EndProject
Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Project2", "Project2.csproj", "{BAC18E5A-710F-4E5A-8DE3-822CE1AA5D38}"
    ProjectSection(ProjectDependencies) = postProject
    EndProjectSection
EndProject

Another symptom of this problem is, that you can not define dependencies between projects (i.e. Visual Studio keeps "forgetting" them).

To fix the problem, simply edit your project files to have unique ids and adjust your solution file accordingly.

Ralph 2010-05-17 02:16:54

My file looks a little different (It says File Forrmat v10 not 8). Each project is listed like this:Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "PROJECTNAME", "PATHTO.csproj", "{ED22D573-32FA-4983-ABB0-7E67B82C1557}"Where the fist GUID is the same for each project, and the second is unique for each project. Should they both be unique?

UpTheCreek 2010-05-17 07:22:43

No, the second number is the ProjectGuid. All projects in the solution must have distinct ProjectGuids.

Ralph 2010-05-17 15:14:25

Ok thanks, so it looks like that is not the problem then.

UpTheCreek 2010-05-18 07:39:44

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VS2008 - 'Set as startup project' setting dissapearing.

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