Get DotNet Versions

GetDotNetVersions.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using Microsoft.Win32;

namespace GetDotNetVersions
{
    class Program
    {
        static void Main(string[] args)
        {
            // Create a RegistryKey, which will access the HKEY_USERS 
            // key in the registry of this machine
            // 
            // The registry key where all the installed .NET Framework versions is 
            // HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\NET Framework Setup\NDP
            // 
            RegistryKey rk = Registry.LocalMachine.OpenSubKey("SOFTWARE")
                .OpenSubKey("Microsoft")
                .OpenSubKey("NET Framework Setup")
                .OpenSubKey("NDP");

            PrintKeys(rk);
            Pause();
        }
        static void PrintKeys(RegistryKey rkey)
        {
            // Retrieve all subkeys for the specified key
            String[] names = rkey.GetSubKeyNames();
            int icount = 0;
            Console.WriteLine("Versions of .NET on your system:");
            foreach (String s in names)
            {
                if (s != "CDF")
                    Console.WriteLine(s.Replace("v", ""));
                // the following code puts a limit on the number 
                // of keys displayed. Comment it out to print 
                // the complete list
                icount++;
                if (icount >= 10)
                    break;
            }
        }
        static void Pause()
        {
            Console.Read();
        }
    }
}