Running PowerShell cmdlets in C#

Question

I need to run powershell cmdlets using C# in Visual Studio Console.

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Management.Automation;
using System.Threading;
using System.Management.Automation.Runspaces;
using System.Collections.ObjectModel;
using System.Collections;

namespace ConsoleApp1
{
    class Program
    {
        private static string RunScript()
        {

            Runspace runSpace = RunspaceFactory.CreateRunspace();
            runSpace.Open();
            Pipeline pipeline = runSpace.CreatePipeline();
            Command cmd = new Command("Connect-MsolService"); 
            pipeline.Commands.Add(cmd);
            ICollection results = pipeline.Invoke();  // Here exception occurs
            runSpace.Close();
            StringBuilder stringBuilder = new StringBuilder();
            foreach (PSObject obj in results)
            {
                stringBuilder.AppendLine(obj.ToString());
            }

            return stringBuilder.ToString();
        }




        static void Main(string[] args)
        {
            using (PowerShell PowerShellInstance = PowerShell.Create())
            {
                Console.WriteLine(RunScript());
                Console.ReadKey();
            }
        }
    }
}

When I run the code an Exception occurs:

The term 'Connect-MsolService' is not recognized as the name of a cmdlet, function, script file, or operable program. Check the spelling of the name, or if a path was included, verify that the path is correct and try again.

Even though it works when I run the commands in Powershell.

This error means that most likely module hasn't been imported. Please check if this answer helps you. — Robert Dyjas

thezar thezar · Accepted Answer · 2020-06-25T15:12:19

Try to use PowerShell instance, like this:

InitialSessionState iss = InitialSessionState.CreateDefault();
iss.ImportPSModule(new[] { "MSOnline" });
iss.LanguageMode = PSLanguageMode.FullLanguage;
var _o365Runspace = RunspaceFactory.CreateRunspace(iss);
_o365Runspace.Open();
var _o365Shell = PowerShell.Create();
_o365Shell.Runspace = _o365Runspace;
var connect = new Command("Connect-MsolService");
connect.Parameters.Add("Credential", new PSCredential("logon@name",
        GetSecureString("Password"));
_o365Shell.Commands.AddCommand(connect);
// add some msol commands to _o365Shell.Commands as well
_o365Shell.Invoke();

Running PowerShell cmdlets in C#

2 Answers