Make it more obvious what constitutes an invalid directory (#7762)
Make it more obvious what constitutes an invalid directory (#7762)


MichaelSimons/core-setup,crummel/dotnet_core-setup,crummel/dotnet_core-setup,MichaelSimons/core-setup,MichaelSimons/core-setup,crummel/dotnet_core-setup,crummel/dotnet_core-setup,crummel/dotnet_core-setup,crummel/dotnet_core-setup,MichaelSimons/core-setup,MichaelSimons/core-setup,MichaelSimons/core-setup