How to check version of .NET installed

Get-ChildItem 'HKLM:\SOFTWARE\Microsoft\NET Framework Setup\NDP\v4\Full\' | Get-ItemPropertyValue -Name Release | Foreach-Object { $_ -ge 379893 } 

Replace 379893 in the previous example with another value from the following table to check for a different minimum-required .NET Framework version.

Version	Minimum value of the Release DWORD
.NET Framework 4.5	378389
.NET Framework 4.5.1	378675
.NET Framework 4.5.2	379893
.NET Framework 4.6	393295
.NET Framework 4.6.1	394254
.NET Framework 4.6.2	394802
.NET Framework 4.7	460798
.NET Framework 4.7.1	461308
.NET Framework 4.7.2	461808