using Microsoft.Win32;

using System;

​

namespace CheckNetFrameworkUpdates

{

    public class Program

    {

        public static void Main(string[] args)

        {

            using (RegistryKey baseKey = RegistryKey.OpenBaseKey(RegistryHive.LocalMachine, RegistryView.Registry32).OpenSubKey(@"SOFTWARE\Microsoft\Updates"))

            {

                foreach (string baseKeyName in baseKey.GetSubKeyNames())

                {

                    if (baseKeyName.Contains(".NET Framework") || baseKeyName.StartsWith("KB") || baseKeyName.Contains(".NETFramework"))

                    {

​

                        using (RegistryKey updateKey = baseKey.OpenSubKey(baseKeyName))

                        {

                            string name = (string)updateKey.GetValue("PackageName", "");

                            Console.WriteLine(baseKeyName + "  " + name);

                            foreach (string kbKeyName in updateKey.GetSubKeyNames())

                            {

                                using (RegistryKey kbKey = updateKey.OpenSubKey(kbKeyName))

                                {

                                    name = (string)kbKey.GetValue("PackageName", "");

                                    Console.WriteLine("  " + kbKeyName + "  " + name);

​

                                    if (kbKey.SubKeyCount > 0)

                                    {

                                        foreach (string sbKeyName in kbKey.GetSubKeyNames())

                                        {

                                            using (RegistryKey sbSubKey = kbKey.OpenSubKey(sbKeyName))

                                            {

                                                name = (string)sbSubKey.GetValue("PackageName", "");

                                                if (name == "")

                                                    name = (string)sbSubKey.GetValue("Description", "");

                                                Console.WriteLine("    " + sbKeyName + "  " + name);

​

                                            }

                                        }

                                    }

                                }

                            }

                        }

​

                    }

                }

            }

​

            Console.Out.WriteLine("Press Enter to exit...");

            Console.ReadLine();

        }

    }

}

​