Earlier today I responded to a shout for help from twitter friend and fellow PowerShell hacker Tim Meers:


After sending Tim some code showing how to host simple PowerShell scripts in your application, I’ve received several requests from others for the same.  I figured it was worth a quick blog post.

The annotated code is below.  This host accepts an item path as input, and uses PowerShell to fetch and format the item as text.

using System;
using System.Linq;

// you'll need to add a reference to System.Management.Automation
using System.Management.Automation;
using System.Management.Automation.Runspaces;

namespace HostSample
    class Program
        // to run this application, specify a path to an item
        //  e.g.:
        //      c:\
        //      env:/computername
        //      hkcu:/software
        static void Main(string[] args)
            // create a RUNSPACE - this is used to maintain state between pipelines.
            //  e.g., variables, function definitions, etc
            using (var runspace = RunspaceFactory.CreateRunspace())
                // open the runspace before you use it

                // set the default runspace for the process;
                //  this is necessary for some features and cmdlets to work properly
                Runspace.DefaultRunspace = runspace;
                // create a POWERSHELL pipeline
                using (var powershell = PowerShell.Create())
                    // assign the runspace to the pipeline
                    powershell.Runspace = runspace;

                    // build up the pipeline
                        .AddParameter("path", args[0])
                        .AddCommand( "out-string");

                    // execute the pipeline
                    var results = powershell.Invoke();

                    // output the results
                    Console.WriteLine( results.FirstOrDefault() );

If you have any questions, please ask them in the comments.