Exchange Powershell with C#

[JD86]

I don't really have a big issue with the powershell working because it works just fine. The problem I'm having is the method exits before the command is actually completed on the Exchange server. I think it may have something to do with the way Exchange throttles powershell commands. Is there a way to use powershell with Exchange but have it completely wait until the command is finish before refreshing my page? Let me give you an example: A user logs into the web interface and decides to enable their user for Exchange. So the user clicks Enable Exchange. This fires a powershell to Exchange running the Enable-Mailbox command. After it completes the command it retrieves updated information from Active Directory / Exchange about the users mailbox. The problem I have is when it tries to retrieve the updated information it hasn't had time to populate in Exchange so it still thinks there isn't a mailbox. I know I could put a sleep in there but I rather do something cleaner. Here is my base class:

public void RunPowershell(PSCommand pscmd = null, String script = null)
{
Runspace remoteRunspace = null;
PSDataCollection errors = new PSDataCollection();

        OpenRunspace(\_uri, \_schema, \_username, \_password, ref remoteRunspace);

        remoteRunspace.Open();
        powershell.Runspace = remoteRunspace;
        powershell.Streams.ClearStreams();
        powershell.Commands.Clear();

        if (pscmd != null)
        {
            String debugLog = "\[RunPowershell\] Executing powershell: ";
            foreach (Command cmd in pscmd.Commands)
            {
                debugLog += cmd.CommandText;
                foreach (CommandParameter cp in cmd.Parameters)
                    debugLog += String.Format("-{0} {1}", cp.Name, cp.Value.ToString());
            }

            Log.Debug(debugLog);
            powershell.Commands = pscmd;
        }
        else if (script != null)
        {
            Log.Debug("\[RunPowershell\] Executing powershell: " + script);
            powershell.Commands.AddScript(script);
        }

        powershell.Invoke();
        ThrowIfError();

        Log.Debug("\[Exited\] RunPowershell");
    }

    private void OpenRunspace(string uri, string schema, string username, string password, ref Runspace remoteRunspace)
    {
        SecureString securePa