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Powershell Runspaces

Mark Wilkinson has a new blog and an itch to explain the notion of runspaces in Powershell:

So I have a problem with some of the posts I’ve read about runspaces. It all comes down to a small detail that I think makes a big difference in your understanding of them.

$Runspace = ::Create()

This code looks innocent. What does it do? You’d probably think it’s creating a new runspace, but it’s not. This code is instead creating a fresh instance of PowerShell. If you run this code and run Get-Runspace you’ll see there is still just one listed, the one attached to your current session. So what is this instance we just created?

Click through for an example and a step-by-step breakout of that example.