Get NuGet.exe version from command-line
Solution 1:
Typing nuget help from the command line will in addition to the expected help information also list the current NuGet.exe version.
Solution 2:
To know which version of NuGet is installed use follow steps
In Visual Studio, use the Help > About Microsoft Visual Studio command and look at the version displayed next to NuGet Package Manager.
Alternatively, launch the Package Manager Console (Tools > NuGet Package Manager > Package Manager Console) and enter
$hostto see information about NuGet including the version.