Running PowerShell script from C#

        private void testRunToolStripMenuItem_Click(object sender, EventArgs e)
        {
            List<string> ls = new List<string>();
            RunPowershellScript(@"c:\Program Files\Microsoft Transporter Tools\PassCh.ps1",ls);
            //log("script complete");

        }

        private static void RunPowershellScript(string scriptFile, List<string> parameters)
        {
            // Validate parameters
            if (string.IsNullOrEmpty(scriptFile)) { throw new ArgumentNullException("scriptFile"); }
            if (parameters == null) { throw new ArgumentNullException("parameters"); }

            RunspaceConfiguration runspaceConfiguration = RunspaceConfiguration.Create();
            PSSnapInException ex;
            runspaceConfiguration.AddPSSnapIn("Microsoft.Exchange.Transporter",out  ex);

            using (Runspace runspace = RunspaceFactory.CreateRunspace(runspaceConfiguration))
            {
                runspace.Open();
                RunspaceInvoke scriptInvoker = new RunspaceInvoke(runspace);
                scriptInvoker.Invoke("Set-ExecutionPolicy Unrestricted");
                Pipeline pipeline = runspace.CreatePipeline();
                Command scriptCommand = new Command(scriptFile);
                Collection<CommandParameter> commandParameters = new Collection<CommandParameter>();
                foreach (string scriptParameter in parameters)
                {
                    CommandParameter commandParm = new CommandParameter(null, scriptParameter);
                    commandParameters.Add(commandParm);
                    scriptCommand.Parameters.Add(commandParm);
                }
                pipeline.Commands.Add(scriptCommand);
                Collection<PSObject> psObjects;
                psObjects = pipeline.Invoke();
            }
        } 

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