Support new Solution(slnx) format intellisense and completion

[mojtabakaviani]

New slnx solution xml base file format, is very cleaner and readable. please support intellisense and completion

[tintoy]

Hi - thanks for the request; we’ll look into it 🙂

[tintoy]

Some info about the format:

https://blog.ndepend.com/slnx-the-new-net-solution-xml-file-format/

[tintoy]

There's now a library available for parsing solution files (both .sln and .slnx):

https://github.com/microsoft/vs-solutionpersistence

I think we'd only want to support .slnx files though; robust parsing of invalid XML is tricky enough, and implementing that for the .sln format doesn't feel like it would be worth the effort.