How do I install Chocolatey using C#?

Question

I tried running the command-line instructions from the website

iex ((new-object net.webclient).DownloadString('https://chocolatey.org/install.ps1'))*

In a pipeline

Runspace runspace = RunspaceFactory.CreateRunspace();
runspace.Open();

// create a pipeline and feed it the script text
Pipeline pipeline = runspace.CreatePipeline();
pipeline.Commands.AddScript(commandToRun);
Collection<PSObject> results = pipeline.Invoke();

// close the runspace
runspace.Close();

And by invoking a process

Process.Start("@powershell -NoProfile -ExecutionPolicy unrestricted -Command \"iex ((new-object net.webclient).DownloadString('https://chocolatey.org/install.ps1'))\" && SET PATH=%PATH%;%ALLUSERSPROFILE%\\chocolatey\\bin")

Answer 1

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace CInstInst
{
    class Program
    {
        static void Main(string[] args)
        {

            string command = @"@powershell -NoProfile -ExecutionPolicy Bypass -Command ""iex ((new-object net.webclient).DownloadString('https://chocolatey.org/install.ps1'))"" && SET PATH=%PATH%;%ALLUSERSPROFILE%\chocolatey\bin";
           ExecuteCommandSync(command);
        }

        public static void ExecuteCommandSync(object command)
        {
            try
            {
                // create the ProcessStartInfo using "cmd" as the program to be run,
                // and "/c " as the parameters.
                // Incidentally, /c tells cmd that we want it to execute the command that follows,
                // and then exit.
                System.Diagnostics.ProcessStartInfo procStartInfo =
                    new System.Diagnostics.ProcessStartInfo("cmd", "/c " + command);

                // The following commands are needed to redirect the standard output.
                // This means that it will be redirected to the Process.StandardOutput StreamReader.
                procStartInfo.RedirectStandardOutput = true;
                procStartInfo.UseShellExecute = false;
                // Do not create the black window.
                procStartInfo.CreateNoWindow = true;
                // Now we create a process, assign its ProcessStartInfo and start it
                System.Diagnostics.Process proc = new System.Diagnostics.Process();
                proc.StartInfo = procStartInfo;
                proc.Start();
                // Get the output into a string
                string result = proc.StandardOutput.ReadToEnd();
                // Display the command output.
                Console.WriteLine(result);
            }
            catch (Exception objException)
            {
                // Log the exception
            }
        }
    }
}

Via this article.

You can verify the install here: C:\ProgramData\chocolatey or by running cinst. If you already have it installed simply rename this to chocolatey.old, which will allow you to test. When you're done - delete the new "chocolatey" folder and rename your "chocolatey.old" folder back.