Just grab the latest release (it's just a single binary) and run from the command line. DOES NOT require .NET to be installed on the machine in order to run.
Example
$ net-version.exe
Checking to see what versions of .NET are installed...
Older .NET versions installed:
============================
v2.0.50727
v3.0
v3.5
v4
v4.0
Newer .NET versions installed:
============================
v4.6 (on an operating system other than Windows 10)
Finished.