Question How to get the output of a powershell exchange management runspace

[Byolock]

Hi everyone,

I want to execute some powershell commands in an exchange management shell and found the following code snipped to do that:

Spoiler: OpenExchangeManagementRunspace

private static Runspace OpenExchangeManagementRunspace(string url,AuthenticationMechanism authenticationMechanism = AuthenticationMechanism.Kerberos,string userName = null,string password = null)
        {
            Runspace runspace = null;

            WSManConnectionInfo shellConnection = null;

            PSCredential shellCred = null;

            int keylenght = 32;
            byte[] intBytes = BitConverter.GetBytes(keylenght);
            Array.Reverse(intBytes);
            byte[] keybyte = intBytes;

            // Username and password is optional when using Kerberos authentication
            if (!string.IsNullOrWhiteSpace(userName) &&
                !string.IsNullOrWhiteSpace(password))
            {
                var securePassword = ConvertToSecureString(password,keybyte);
                shellCred = new PSCredential(userName, securePassword);
            }

            shellConnection = new WSManConnectionInfo(new Uri(url), "http://schemas.microsoft.com/powershell/Microsoft.Exchange", shellCred);

            shellConnection.AuthenticationMechanism = authenticationMechanism;

            // This will take some time
            runspace = RunspaceFactory.CreateRunspace(shellConnection);
            runspace.Open();
          
            return runspace;
        }

Spoiler: Executing a PS Command

private void button1_Click_1(object sender, EventArgs e)
        {
            //https://stackoverflow.com/questions/57326768/how-can-i-start-a-script-in-exchange-management-shell-from-c
            using (Runspace remoteRunspace = OpenExchangeManagementRunspace("http://domain/powershell?serializationLevel=Full;clientApplication=MyAppName"))
            using (PowerShell shell = PowerShell.Create())
            {
                shell.Runspace = remoteRunspace;
                Pipeline pipeline = remoteRunspace.CreatePipeline();
                pipeline.Commands.AddScript("Get-MailboxFolderStatistics user");
                //pipeline.Commands.Add("Out-String");


                Collection<PSObject> results = pipeline.Invoke();
                StringBuilder stringBuilder = new StringBuilder();
                foreach (PSObject pSObject in results)
                    stringBuilder.AppendLine(pSObject.ToString());
                textBox1.Text = stringBuilder.ToString();

            }

I altered the second one the get me the output of the shell but i'm doing something wrong here. If the powershell output is small I sometimes get a fraction of the output (which means at least the command gets executed) in my application, however larger outputs create "nonsense" like this

Microsoft.Exchange.Management.Tasks.MailboxFolderConfiguration
Microsoft.Exchange.Management.Tasks.MailboxFolderConfiguration
Microsoft.Exchange.Management.Tasks.MailboxFolderConfiguration
Microsoft.Exchange.Management.Tasks.MailboxFolderConfiguration
Microsoft.Exchange.Management.Tasks.MailboxFolderConfiguration
......

You can see //pipeline.Commands.Add("Out-String"); in the second code block. I've seen many people using "Out-String" in similar code but enabling it gets me :
System.Management.Automation.RemoteException: "Out-String" wasn't found as a cmdlet, function or scriptfile.

Moreover, I don't understand why I should convert the output to a string if I put it in an PSObject Collection afterwards.

Do I have to add Out-String? If so anybody got an Idea why I get that not found error?
Or is my approach completely wrong?


Sorry for any dumb questions and dirty code C# is fairly new for me, working with C# in connection with powershell completely new.