Visual Studio 2026 removes DefaultStartup every time I add a project to the solution

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1. Read the whole issue, then the project's contributing guide.
2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
3. Fork the repository and make your change on a branch.
4. Open a pull request that references the issue number.

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  microsoft/vs-solutionpersistence#151 · 1 assignee · Opened Jun 2, 2026

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