MSBuild: Command Line Build error: Solution file error MSB5023: Error parsing the nested project section
I faced the same issue and managed to sort out:
- Opened .sln in NotePad and found Guids
- One of my projects wasn't closed ("EndProject" was missed)
Cheers, hope this can help anyone
Or you can add a new file to the solution and save. This should rebuild the solution. After confirming the build is working fine, the file can be safely removed and saved.
It is possible you may also have an issue where the line could have gotten in here with a merge conflict where it wasn't deleted when a project was deleted. If you can't find any other references in your project with a global search of the GUID, try deleting the line in the .sln file and rebuilding.