'Where is it recorded which projects unloaded from a solution in Visual Studio Professional 2019

I have a solution with 6 projects loaded into Visual Studio 2019. It is a C# solution. I unload a project, and go to the "Git Changes" tab expecting to see an unstaged change to a file somewhere that records the fact that Project A is now unloaded. There are no unstaged changes. I reloaded the project, and still there are no unstaged changes on the "Git Changes" tab. It must be recorded somewhere that a project of a solution is unloaded. My question is, in which file is this unloaded project status recorded? Many thanks.



Sources

This article follows the attribution requirements of Stack Overflow and is licensed under CC BY-SA 3.0.

Source: Stack Overflow

Solution Source