How to pass a [switch] parameter to a PowerShell script from C#?

I have this powershell script named testSwitch.ps1: ``` param( [switch] $s ) Return 's= ' + $s ``` When I invoke this script directly in PowerShell like this: ``` .\testSwitch.ps1 -s ``` The output is ``` s= True ``` And it outputs False when the switch is missing. But when I try to invoke the same script with this C# code: ``` Command command = new Command(@"testSwitch.ps1"); command.Parameters.Add(new CommandParameter("s")); RunspaceConfiguration runspaceConfiguration = RunspaceConfiguration.Create(); using (Runspace runspace = RunspaceFactory.CreateRunspace(runspaceConfiguration)) { runspace.Open(); Pipeline pipeline = runspace.CreatePipeline(); pipeline.Commands.Add(command); IEnumerable<PSObject> psresults = new List<PSObject>(); psresults = pipeline.Invoke(); Console.WriteLine(psresults.ToArray()[0].ToString()); } ``` the output is: ``` s= False ``` It seems that the CommandParameter always interprets switch parameters as false, unlike the PowerShell command-line interpreter. The frustrating thing is that this causes the script to see a value of false for the `[switch]` parameter without throwing any exceptions about not specifying a value. As opposed to a `[bool]` parameter, which will throw an exception if you do not provide a value in the `CommandParameter` constructor.