PowerShell script run from C# is lacking several modules

Question

var runspace = RunspaceFactory.CreateRunspace()
runspace.Open();
var ps = PowerShell.Create()
ps.Runspace = runspace;
ps.AddCommand(...);
ps.Invoke()

Some cmdlets that exist in a regular shell are missing from the runtime started by C#, e.g. all the commands from the Microsoft.PowerShell.LocalAccounts module :

Error: System.Management.Automation.CommandNotFoundException: The term 'New-LocalUser' is not recognized as the name of a cmdlet, function, script file, or operable program. Check the spelling of the name, or if a path was included, verify that the path is correct and try again.
  at System.Management.Automation.ExceptionHandlingOps.CheckActionPreference(FunctionContext funcContext, Exception exception)
  at System.Management.Automation.Interpreter.ActionCallInstruction`2.Run(InterpretedFrame frame)
  at System.Management.Automation.Interpreter.EnterTryCatchFinallyInstruction.Run(InterpretedFrame frame)
  at System.Management.Automation.Interpreter.EnterTryCatchFinallyInstruction.Run(InterpretedFrame frame)

By comparing the Get-Module -ListAvailable output from a regular shell and a C# started one I noticed multiple modules are missing :

AppBackgroundTask
AssignedAccess
BitLocker
ConfigCI
Defender
Microsoft.PowerShell.LocalAccounts
MMAgent
NetworkSwitchManager
PcsvDevice
PSWorkflow, PSWorkflowUtility
SmbShare, SmbWitness
StartLayout
WindowsSearch

The version ($PSVersionTable) is reported as the same in both shells : 5.1.14393.693

Edit

Seems to be the same issue & solution : Why do powershell modules not import when running powershell via start process in c#?

You could use Import-Module with the complete path for that module or would have to set/fix the PSModulePath, that would be my guess. For whatever reason it's different in that case. — Seth
– Seth, Commented Jan 17, 2017 at 13:50

datarocker · Accepted Answer · 2017-01-17 01:45:23Z

0

You can import modules directly on your script instead of trying to do that from C#.

Import-module bitlocker

For example.

answered Jan 17, 2017 at 1:45

datarocker

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2 Comments

Bax Over a year ago

Does not help. Actually, according to MSDN :

Beginning in Windows PowerShell 3.0, modules are imported automatically when any cmdlet or function in the module is used in a command.

Seth Over a year ago

Did you check the version of PowerShell that is being started?

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