Cannot pass empty string as property value for WindowsPowerShell adapted resource

[kevincathcart-cas]

Prerequisites

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Summary

Cannot seem to pass empty string as a property value for a WindowsPowerShell Adapted resource

Steps to reproduce

On clear core install of Server 2025:

1. Install-WindowsFeature Web-Server
2. Install-Module WebAdministrationDsc (answer yes as needed)
3. Create the following configuraton yaml

resources:
  - name: Create App Pool
    type: WebAdministrationDsc/WebAppPool
    properties:
      Name: MyAppPool
      Ensure: Present
      ManagedRuntimeVersion: ''

4. run dsc config set --file test.yaml

Expected behavior

Creates or modifies the app pool MyAppPool to have be configured for no managed code.

Actual behavior

Error (see below). I've tried a few different approaches for escaping, but I either end up getting told that my value 'does not belong to the set "v4.0,v2.0," specified by the ValidateSet attribute.' Or I get the main error.

Error details

PS C:\Users\Administrator\dsc> ./dsc config set --file .\test.yaml
2026-05-22T19:43:57.782580Z ERROR Error: Parser: Unable to parse statement root:
PS C:\Users\Administrator\dsc>

Environment data

Name                           Value
----                           -----
PSVersion                      5.1.26100.7462
PSEdition                      Desktop
PSCompatibleVersions           {1.0, 2.0, 3.0, 4.0...}
BuildVersion                   10.0.26100.7462
CLRVersion                     4.0.30319.42000
WSManStackVersion              3.0
PSRemotingProtocolVersion      2.3
SerializationVersion           1.1.0.1

Version

3.2.1

Visuals

No response