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Editorial Team
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Asked: 2026-05-14T14:42:31+00:00

It seems the System.Management.Automation assembly only ever exists in version 1.0.0.0 on my system,

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It seems the System.Management.Automation assembly only ever exists in version 1.0.0.0 on my system, available in the GAC as well as in the following folder:

%ProgramFiles%\Reference Assemblies\Microsoft\WindowsPowerShell\v1.0

I can confirm that I do have PowerShell 2.0 installed, though, since I have support for PowerShell modules and remoting working from the shell…

Looking through Reflector, I can observe that the ICmdletProviderSupportsHelp interface is definitely not there.
So, the question is, where is it implemented?

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1 Answer

  1. Editorial Team

    To get the reference assemblies for the additions in PSH V2 you need a recent (V7 or later) version of the Windows SDK.

    But note that these still appear as V1.x, e.g. strong name System.Management.Automation, Version=1.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35.

    But the file version is 6.1.7600.16385, which is later than the reference assemblies from V1, and it does contain ICmdletProviderSupportsHelp.

    (This lack of a version change seems, to me, to be down to wanting 100% forward compatibility from PSH V1: the V2 assemblies add things, but do not remove or change anything that existed for V1.)

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