Web Reference: Oct 19, 2020 · Starting in PowerShell Core and continuing in PowerShell 7, the ability to define a custom error message has become possible. Instead of using a default error based on the parameter decoration, instead, you can define your own. Is it possible to have ValidateScript generate a custom error message when a test fails, like say Test-Path? Instead of this: Test-Folder : Cannot validate argument on parameter 'Folder'. One aspect of parameter validation is managing errors effectively. This article will explore how to customize parameter validation errors in PowerShell, providing clear guidance and practical examples along the way.
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