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I upgraded VS from 2019 to 2022. Many projects cannot be loaded.
When I click "Reload Project" for an ASP.Net MVC project
I get the error message "A project with the same name is already opened in the solution"
Could anyone offer a tip on how to remedy this?
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For me I got this unhelpful error message when picked up a project I've not used before that hadn't been touched for years and the API wouldn't load saying it was already open in the solution.
I tried removing the .vs , agent ransacking to find the duplicate. I even had a read online as the API name was preferences and i wondered if that was now a standard library. In the end i dropped the API from the main project and loaded that standalone so i could at least get something running.
The result was the API needed IIS setting up for it. Once I'd done so the API would run standalone, i was able to revert the changes in the main project to restore it back in and low! no stupid error message, the project loaded fine.
Could the project be an older version of MVC? Maybe you need to open the visual studio 2022 installer and install mvc 4 it is under individual components
Thank you for trying to help. I do not see "ASP.NET... prerequisites" but "ASP.NET..." has been installed.
BTW, all is good now after starting VS2022 as administrator. It seems that I always forget this whenever I upgrade VS. I have to go through the awkward hassle to start VS as an administrator automatically. I don't for how long Microsoft will allow this hack to work.
For me, the problem was caused by a undo change on the .csproj change of IIS Local to IIS Express. The resolution was simple delete the .csproj.user file.