How exactly does “Visual Studio Version Selector” chooses a Visual Studio version?

Question

For extensions like .sln or .csproj, the default application is Microsoft Visual Studio Version Selector. I\'ve got two versions installed

Answer 1

The .sln file must be a UTF-8-BOM file and it must start like this:

[blank line]
Microsoft Visual Studio Solution File, Format Version XX.XX[XXX...]
[description]

The [description] is for example # Visual Studio Express 2012 for Windows Desktop for VS 2012 or # Visual Studio 15 for VS 2017.

The second line is case sensitive but the third line (description) is not. If it is missing, the Selector seems to start the latest VS.

The VisualStudioVersion entry is ignored.

However, for the right file icon to be displayed, the [description] has to be exact and case sensitive.