nuget.exe install with -ExcludeVersion will match existing directories that have a version

[hickford]

NuGet Product Used

NuGet.exe

Product Version

6.9.1.3

Repro Steps & Context

Confusing behaviour when installing with and without ExcludeVersion

If you install a package with and without option ExcludeVersion:

nuget.exe install Moq -Version 4.9.0 -ExcludeVersion
nuget.exe install Moq -Version 4.9.0

You get two installations in folders Moq and Moq.4.9.0 as expected.

But if you try the same commands in reverse order:

nuget.exe install Moq -Version 4.9.0
nuget.exe install Moq -Version 4.9.0 -ExcludeVersion

You get just one installation Moq-4.9.0. The second command prints message:

Package "Moq.4.9.0" is already installed.

This is confusing. I expected a second installation in folder Moq as above.