C#中调用PowerShell代码

　　　　　　 using (Runspace runspace = RunspaceFactory.CreateRunspace())
{
try
{
runspace.Open();
Pipeline pipeline = runspace.CreatePipeline();
//必须要用AddScript。
pipeline.Commands.AddScript("Add-PSSnapin Microsoft.SharePoint.PowerShell");
pipeline.Commands.AddScript("$webApplications = Get-SPWebApplication");
pipeline.Commands.AddScript("$webApplicationUrls = $webApplications.url");
pipeline.Commands.AddScript("Get-SPWebApplication");
Collection<PSObject> results = pipeline.Invoke();
foreach (PSObject result in results)
{
MessageBox.Show(result.ToString());
}
}
catch (Exception ex)
{
MessageBox.Show(ex.ToString());
}
}