MSBuild and .sln files

When MSBuild builds solution file MySolution.sln it actually silently converts it to the well-known MSBuild proj file.

Sometime it is useful to see the converted version.

To do this you need to set environment variable

set msbuildemitsolution=1

then when you run```bash

MSBuild MySolution.sln

it will create corresponding **MySolution.sln.metaproj**