C# – First steps with C# and .NET – part 064. – free-tutorials.org with free tutorials and source code

This is a simple example of how to add to the Environment Variable variable Path a simple path read on the admin console.
This code first retrieves the current system environment variables using the Environment.GetEnvironmentVariables method.
Create a simple project with dotnet tool and add this source code:

using System;
using System.Collections;
using System.Collections.Specialized;
using System.Diagnostics;
using System.Runtime.InteropServices;

class Program
{
    static void Main(string[] args)
    {
        Console.Write("Enter the path to add: ");
        string pathToAdd = Console.ReadLine();
        Console.WriteLine($"Path to be added: {pathToAdd}");

        // Get the current system environment variables
        var envVariables = Environment.GetEnvironmentVariables(EnvironmentVariableTarget.Machine);

        // Add the new path to the PATH variable
        if (envVariables.Contains("Path"))
        {
            string currentPath = envVariables["Path"] as string;
            string newPath = $"{currentPath};{pathToAdd}";
            Environment.SetEnvironmentVariable("Path", newPath, EnvironmentVariableTarget.Machine);
            Console.WriteLine("New path added successfully!");
        }
        else
        {
            Console.WriteLine("PATH variable not found!");
        }
    }
}

using System;

using System.Collections;

using System.Collections.Specialized;

using System.Diagnostics;

using System.Runtime.InteropServices;

class Program

{

static void Main(string[] args)

{

Console.Write("Enter the path to add: ");

string pathToAdd = Console.ReadLine();

Console.WriteLine($"Path to be added: {pathToAdd}");

// Get the current system environment variables

var envVariables = Environment.GetEnvironmentVariables(EnvironmentVariableTarget.Machine);

// Add the new path to the PATH variable

if (envVariables.Contains("Path"))

{

string currentPath = envVariables["Path"] as string;

string newPath = $"{currentPath};{pathToAdd}";

Environment.SetEnvironmentVariable("Path", newPath, EnvironmentVariableTarget.Machine);

Console.WriteLine("New path added successfully!");

}

else

{

Console.WriteLine("PATH variable not found!");

}

Depending on the system security level you can add an app.manifest file with this source code in order to avoid running on console administrator:

<?xml version="1.0" encoding="utf-8"?>
<assembly manifestVersion="1.0" xmlns="urn:schemas-microsoft-com:asm.v1">
  <trustInfo xmlns="urn:schemas-microsoft-com:asm.v3">
    <security>
      <requestedPrivileges>
        <requestedExecutionLevel level="requireAdministrator" uiAccess="false" />
      </requestedPrivileges>
    </security>
  </trustInfo>
</assembly>

<?xml version="1.0" encoding="utf-8"?>

</requestedPrivileges>

</security>

</trustInfo>

</assembly>

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