I have a couple of questions and doubts to regarding PowerShell and .NET Classes.
I am trying to write a class 'foo' that will call Rest web service and perform some tasks. If I deploy the class in GAC then can I call it from PowerShell?
You can load your assembly with the Add-Type cmdlet or with System.Reflection.Assembly class and then you can use the New-Object cmdlet to create objects from your assembly classes.