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I use Powershell's "custom-object" command to create custom objects with properties I want to save. But custom-object applies only to one variable. Is it possible to create a custom class, like in ...

pscustomobject is the preferred route - it orders things, and is way faster. You can also set custom types. Only downside is that you need PowerShell v3 or later... but realistically, you should be on ...