Download and install Chocolatey package

Here’s a C# code example that downloads and installs Chocolatey package manager on a Windows system:

using System;
using System.Diagnostics;
using System.IO;
using System.Net;

public class ChocolateyInstaller
{
    public static void DownloadChocolatey()
    {
        string chocolateyInstallerUrl = "https://chocolatey.org/install.ps1";
        string installScriptPath = Path.Combine(Path.GetTempPath(), "install_chocolatey.ps1");

        using (var webClient = new WebClient())
        {
            webClient.DownloadFile(chocolateyInstallerUrl, installScriptPath);
        }

        // Run the downloaded install script
        var process = new Process
        {
            StartInfo =
            {
                FileName = "powershell",
                Arguments = $"-ExecutionPolicy Bypass -NoProfile -File \"{installScriptPath}\"",
                UseShellExecute = false,
                CreateNoWindow = true
            }
        };

        process.Start();
        process.WaitForExit();

        // Delete the temporary install script file
        File.Delete(installScriptPath);
    }

    public static void Main()
    {
        Console.WriteLine("Downloading and installing Chocolatey...");
        DownloadChocolatey();
        Console.WriteLine("Chocolatey installation completed.");
    }
}

In this code, the DownloadChocolatey() method downloads the Chocolatey installation script from the official Chocolatey website (https://chocolatey.org/install.ps1) using a WebClient object. The script is saved as a temporary file (install_chocolatey.ps1) in the system’s temporary folder.

After downloading the script, the code runs the script using PowerShell by starting a new Process and providing the necessary arguments to execute the downloaded script. The PowerShell process runs in the background without displaying any windows.

Once the script execution is complete, the temporary installation script file is deleted.

In the Main() method, we call DownloadChocolatey() to initiate the download and installation process. We display appropriate messages to indicate the progress and completion of the installation.

You can run this code on a Windows system with PowerShell enabled to download and install Chocolatey package manager.