Why does calling PowerShell from C # raise a System.Management.Automation.CommandNotFoundException?

Question

I am using this C #:

    public bool RunPowershell(string script)
    {
        RunspaceConfiguration runspaceConfig = RunspaceConfiguration.Create();

        using (Runspace runspace = RunspaceFactory.CreateRunspace(runspaceConfig))
        {
            runspace.Open();

            using (RunspaceInvoke scriptInvoker = new RunspaceInvoke(runspace))
            {
                scriptInvoker.Invoke(script);
            }
        }

        return true;
    }

To run this script:

      Add-PSSnapin -name Microsoft.SystemCenter.VirtualMachineManager
      $vmm = Get-VMMServer -ComputerName "VmmComputerName"

It works fine on 32-bit Windows 2003, but on 64-bit Windows 2008R2 I get this error:

System.Management.Automation.CommandNotFoundException: The term 'Get-VMMServer' 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.CommandDiscovery.LookupCommandInfo(String commandName, CommandOrigin commandOrigin)
at System.Management.Automation.CommandDiscovery.LookupCommandProcessor(String commandName, CommandOrigin commandOrigin, Nullable`1 useLocalScope)
at System.Management.Automation.CommandFactory._CreateCommand(String commandName, CommandOrigin commandOrigin, Nullable`1 useLocalScope)
at System.Management.Automation.ExecutionContext.CreateCommand(String command)
at System.Management.Automation.CommandNode.CreateCommandProcessor(Int32& index, ExecutionContext context)
at System.Management.Automation.CommandNode.AddToPipeline(PipelineProcessor pipeline, ExecutionContext context)
at System.Management.Automation.PipelineNode.Execute(Array input, Pipe outputPipe, ArrayList& resultList, ExecutionContext context)
at System.Management.Automation.ParseTreeNode.Execute(Array input, Pipe outputPipe, ExecutionContext context)
at System.Management.Automation.AssignmentStatementNode.Execute(Array input, Pipe outputPipe, ExecutionContext context)
at System.Management.Automation.StatementListNode.ExecuteStatement(ParseTreeNode statement, Array input, Pipe outputPipe, ArrayList& resultList,     ExecutionContext context)

And I have Microsoft.SystemCenter.VirtualMachineManager installed. The script also works if I manually entered it into the Power-shell console on a 2008R2 machine.

Can you please help with any ideas on what I might lose?

Many thanks.

Answer 1

- , powershell. , 32- . , , - 64- .NET framework installutil.exe( framework64), , 32 - . 32- COM-, 64- .

, :

1) 64 installutil.exe/i ( )

2) .NET exe 32- VS (anycpu → x86)

3) script : http://www.nivot.org/blog/post/2012/12/18/Ensuring-a-PowerShell-script-will-always-run-in-a-64-bit-shell

-Oisin