using System;

    using System.Text;

​

    class HelloWorld {

      static void Main() {

        bool schlussJetzt=false; string inputString;

        StringBuilder inputBuilder = new StringBuilder();

​

        do {

            Console.WriteLine("Hello World!");

            //ConsoleKeyInfo x = Console.ReadKey();

            while (true)

            {

                ConsoleKeyInfo inputKey = Console.ReadKey(true);

                if (inputKey.Key == ConsoleKey.Enter)

                {

                    inputString = inputBuilder.ToString();

                    break;

                }

                else if (inputKey.Key == ConsoleKey.Escape)

                {

                    inputString = null;

                    schlussJetzt=true;

                    break;

                }

                else

                    inputBuilder.Append(inputKey.KeyChar);

                    Console.Write(inputKey.KeyChar);

            }

            Console.WriteLine("");

        } while (schlussJetzt==false);

        Console.WriteLine("Ciao World!");

      }

    }

​