Upon opening up a project, I am met with the same Visual Studio error/warning messages 4 times in a row :
The project cannot be added to the solution because a project with the same project filename already exists in the solution.
While initially working on a project, namespaces like 'using UnityEngine' or 'using UnityEngine.SceneManagement' work just fine, but again, once I save/exit, and then re-open the project I encounter these errors.
* While typing this question, MonoDevelop has opened up on its own. (I do not use MonoDevelop and haven't opened it in years.)
Would uninstalling/disabling MonoDevelop help this problem? (Even if it does, I am wondering how to solve the underlying issue.)
Thank you for any of your time and help.
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