The solution or project you are opening must be converted. It was either created in a previous version of Visual Studio, ...

The solution or project you are opening must be converted.  It was either created in a previous version of Visual Studio, or it relies on an older version of a program that you have installed on your computer.  After a solution or any of its projects has been converted, it may no longer be possible to edit, build, or run in previous versions.

If the solution or project is under source control, it will be checked out automatically during the conversion.  Be sure the correct Source Control Plug-in is active, and no files are exclusively checked out by other users.

If the solution or project is not under source control, please ensure that all files have read/write permissions.



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