Powershell C # Asynchronous Execution

Question

I want to execute an assembler PowerShell script in C #. I used the method BeginInvoke, but I can not get the output / errors, even if I attached delegates to them. Here is my C # code:

using(ps=PowerShell.Create())
{
    PSDataCollection<PSObject> output=new PSDataCollection<PSObject>();
    output.DataAdded+=output_DataAdded;
    ps.AddScript(RenewalScript);
    SecureString ss = new SecureString();
    for (int i = 0; i < Password.Length; i++)
        ss.AppendChar(Password.ElementAt(i));

    PSCredential cred = new PSCredential(Username, ss);
    ps.AddParameter("Credential", cred);
    ps.AddParameter("BuildServer", Server);
    ps.AddParameter("CAServer", CAServer);
    ps.AddParameter("CAName", CAName);
    ps.Streams.Error.DataAdded += Error_DataAdded;
    var result=ps.BeginInvoke<PSObject, PSObject>(null, output);

}

void output_DataAdded(object sender, DataAddedEventArgs e)
{
    //display output in UI
}

void Error_DataAdded(object sender, DataAddedEventArgs e)
{
    //display error message in UI
}

I have several statements Write-Outputin my script. However, methods DataAddednever run. But they fire when I use the synchronous method Invoke.

Answer 1

. . , . , Task.Factory.FromAsync(...), Task<PSObject> , await.