MSBuild: Command Line Build error: Solution file error MSB5023: Error parsing the nested project section

Question

I have a solution which uses Solution Folders to split out the projects. In the Visual Studio IDE, the solution builds fine.

However when running the build using MSB

Answer 1

Due to a merge conflict, my solution file was trying to stick two projects in a solution folder that didn't exist anymore. the NestedProjects section near the bottom mentioned a Guid that was removed from the Project enumeration at the top.