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Save default project(s) in the .sln file

As per http://stackoverflow.com/questions/694730/why-is-set-as-startup-option-stored-in-the-sou-file-and-not-the-sln-file/1808264#1808264 , store the Startup Project(s) selected in the IDE in the .sln file, but allow them to be overridden by Startup Project(s) stored in the .suo file.

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    The_AssimilatorThe_Assimilator shared this idea  ·   ·  Flag idea as inappropriate…  ·  Admin →


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      • Carmai ConstantCarmai Constant commented  ·   ·  Flag as inappropriate

        This feature should be implemented. I would be useful to store in source control the default project to startup. It is helpful for everyone on the development team. It would be one less thing to document. A new developer could simply pull the solution from source control and run the application.

      • Mark HancockMark Hancock commented  ·   ·  Flag as inappropriate

        What is the solution when using a build server?
        Do we have to check in the suo file into Version Control? -- That seems like a bad idea.
        Do we manually set the order in the sln and rely on that to work? -- Could a future solution change 'fix' it back?
        Do we start the name of the StartUp project 'AAAA'? -- LOL, does not address multiple Startup Apps
        There needs documented way to set the StartUp project(s) for a machine built solution.

      • CarlinCarlin commented  ·   ·  Flag as inappropriate

        I find this behavior very strange because the .csproj file can have any "user specific" settings copied into it from the user csproj file.

      • Michel CourtineMichel Courtine commented  ·   ·  Flag as inappropriate

        I just wrote a little command line utility for windows called slnStartupProject to solve this. It sets the Startup Project automatically like this:

        slnStartupProject slnFilename projectName

        I personally use it to set the project after generating the solution with [cmake](http://cmake.org) that always sets a dummy ALL_BUILD project as the first project in the solution.

        The source is on github:


        Forks and feedbacks are welcome.

        Hope this helps!

      • Praveen YaramadaPraveen Yaramada commented  ·   ·  Flag as inappropriate

        +1. Totally agree.
        This would be quite useful where a solution uses multiple start up files in a specific order. Having this in sln will allow it to checked in to the source control system.

      • Dawid CiecierskiDawid Ciecierski commented  ·   ·  Flag as inappropriate

        Definitely agree that this should be seriously considered. While in simple cases (one-two projects) I agree that this may sound as overkill as others have pointed out, but in more complex solutions this would be a huge time-saver.

        In our case we have a solution comprising of ~20 projects, five of which have to be started to do any sort of debugging. Selecting them once-twice a day when checking out new dev branches is annoying, and error-prone.

      • Laurence EvansLaurence Evans commented  ·   ·  Flag as inappropriate

        This is an issue primarily if you require multiple startup projects, there's no way to have this information saved and has to be set everytime you get a clean solution without a suo file.

      • Anonymous commented  ·   ·  Flag as inappropriate

        It is not a big problem in development machine. However, on a build machine, the command line build failed due to different startup project until we loaded the project in VS and set the startup project to set that in the .suo local file.

      • Antoine BervoetAntoine Bervoet commented  ·   ·  Flag as inappropriate

        +1 for this request.
        I am currently working on a full solution generation project and can not set my web project as startup... i always must set it by reopening the solution in VS and right clicking.
        Not that big issue i agree, but it would help to be able to set this in the .sln file

      • Trout ManTrout Man commented  ·   ·  Flag as inappropriate


        I think you missed the point completely. It's not that a given developer can't figure out how to set a start up project, its that having the ability to set a sane default and have it stick is a *good* thing. Do you disagree that a large percentage of projects usually have a project that serves as the entry point for the solution? Web applications come to mind...

        To your second issue, that would work just like it does now. If you really needed a different start up project, it can get stored in the .suo file.

        Honestly, I can't fathom why people don't see the usefulness of a default. Likely they work in isolation, or at Microsoft, because on every single team I've been on we *all* used the same start up 99% of the time. ;-)

      • chrischris commented  ·   ·  Flag as inappropriate

        I see absolutely no benefit to this. If a developer can't figure out which project to start, why does that need to be defaulted for him/her? Sounds more like a training issue.

        Also, how would the IDE even know when a user really wanted to change from the default or when to go back to the default? Seems like a mess waiting to happen.

      • AdamAdam commented  ·   ·  Flag as inappropriate


        No it wouldn't, the request is to be able to set a default start project in the .sln file which can be overridden in the .suo file. Under normal circumstances if the user chooses their own startup project it will only change the .suo file and not the .sln file.

      • SandRockSandRock commented  ·   ·  Flag as inappropriate

        Doing this would create too much versioning on the .sln files. If developers change the startup project settings, they will check it in all the time.

        The idea is good but I think the .sln may contain "default startup projet values" but the actual values should stay in the .suo file.

      • JimmyJimmy commented  ·   ·  Flag as inappropriate

        I'd really like to see this as I want all of my developers to have (by default) a set of startup projects including a single unit test project (without debugging) so that the results are continuously shown at build time.

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