Write PowerShell commands in C#

Question

Hi,
I want to invoke powershell commands using C# from my wcf service. However, I keep getting the following error:
An exception of type 'System.Management.Automation.ParameterBindingException' occurred in System.Management.Automation.dll but was not handled in user code
The powershell script that I want to convert into C#:
Get-VM -Name TestVM | FT State
Here's what I wrote in my WCF Service in C#:
PowerShell ps = PowerShell.Create();
ps.AddCommand("Get-VM");
ps.AddParameter("Name", "TestVM");
ps.AddParameter("Format-Table");
ps.AddParameter("State");
var result = ps.Invoke();
Can anyone point to me where I went wrong with the codings?
Thanks. 

Answer 1

After trying out for some time, I've managed to figure how to invoke it the way I want to.
Here's the code of my WCF service:
getStatus.VmName = "TestVM";
string vmState = "";
if (getStatus.VmName != "")
PowerShell ps = PowerShell.Create();
ps.AddCommand("Get-VM");
ps.AddParameter("Name", getStatus.VmName.Trim());
var result = ps.Invoke();
foreach (PSObject r in result)
VirtualMachineDetails vmInfo = new VirtualMachineDetails();
vmInfo.VmStatus = r.Members["State"].Value.ToString();
vmState = vmInfo.VmStatus;
return vmState;
It's quite simple actually it's just that I'm new to writing powershell codes in C#, thus it took much longer time to figure this out. Hope this will help others out there.