Must read

This is a very in-depth guide on what hashtables can be used in powershell, must read. I have some situations which I am considering hashtables such as storing the source, destination and service to one row of firewall rule, and concatenate the next firewall rule with the same properties.

See this https://kevinmarquette.github.io/2016-11-06-powershell-hashtable-everything-you-wanted-to-know-about/