static void Main(string[] args)
        {
            string propertyName = "ManagedPipelineMode";
            int mode = -1;

            if (args.Length < 2 || string.Compare(args[0], "/?") == 0 || string.Compare(args[0].ToLower(), "/help") == 0)
            {
                ShowHelp();
                return;
            }

            string appPoolName = args[0];
            string pipeLineMode = args[1].ToLower();

            switch (pipeLineMode)
            {
                case "classic":
                    mode = 1;
                    break;
                case "integrated":
                    mode = 0;
                    break;
                default:
                    mode = -1;
                    break;
            }

            if (mode == -1)
            {
                ShowHelp();
                return;
            }

            DirectoryEntry poolRoot = new DirectoryEntry("IIS://localhost/W3SVC/AppPools");

            try
            {
                DirectoryEntry pool = poolRoot.Children.Find(appPoolName, "IIsApplicationPool");
                pool.InvokeSet(propertyName, mode);
                pool.CommitChanges();
            }
            catch (DirectoryNotFoundException ex)
            {
                Console.WriteLine("Application pool name was not found.");
                Console.WriteLine(ex.Message);
            }
            catch (COMException ex)
            {
                Console.WriteLine("Error in changing property \"" + propertyName + "\" of Application Pool \"" + appPoolName + "\"");
                Console.WriteLine(ex.Message);
            }
            catch (Exception ex)
            {
                Console.WriteLine("Unknown error.");
                Console.WriteLine(ex.Message);
            }
        }

        private static void ShowHelp()
        {
            Console.Wr