Upgrade from net452 to net462 for Windows PowerShell

PR Summary

Upgrading since older framework version will go out of support and and targeting a newer version will allow us to use more APIs. 4.6.2 is the older, still supported one https://devblogs.microsoft.com/dotnet/net-framework-4-5-2-4-6-4-6-1-will-reach-end-of-support-on-april-26-2022/

As part of it I also fixed a bug that was introduced in PR #1425 where one line of code wasn't upgraded from PSV6 to PSV7

Furthermore APIs are being used that are in net462 but weren't available in net452

[x] PR has a meaningful title
- Use the present tense and imperative mood when describing your changes
[x] Summarized changes
[x] Change is not breaking
[x] Make sure all .cs, .ps1 and .psm1 files have the correct copyright header
[ ] Make sure you've added a new test if existing tests do not effectively test the code changed and/or updated documentation
[ ] This PR is ready to merge and is not Work in Progress.
- If the PR is work in progress, please add the prefix WIP: to the beginning of the title and remove the prefix when the PR is ready.