PowerShell oneliner to list all the installed .NET versions on a local computer - http://www.happysysadm.com/2017/12/powershell-oneliner-to-list-all.html

get-DotNetVersions.ps1

<#
.SYNOPSIS
     <A brief description of the function or script. This keyword can be used only once in each topic.>
.DESCRIPTION
     <A detailed description of the function or script. This keyword can be used only once in each topic.>
.LINK
     http://www.happysysadm.com/2017/12/powershell-oneliner-to-list-all.html
#>
((ls 'HKLM:\SOFTWARE\Microsoft\NET Framework Setup\NDP' -rec|? {$_.name -match 'v1.1.4322$|v2.0.50727$|v3.0$|v3.5$|v4\\Full$'} | select -expand name) -replace 'HKEY_LOCAL_MACHINE','HKLM:') -replace 'HKEY_LOCAL_MACHINE','HKLM:'|%{ Get-ItemProperty $_} | select -expand Version