C# while loop Running until user press key

1. static void CancelDemo()
           {
               int i = 0;
               //Console.WriteLine("Press ESC to stop");
   
               //while (!(Console.KeyAvailable && Console.ReadKey(true).Key == ConsoleKey.Escape))
               //{
               //    Console.WriteLine(++i);
               //}
               Console.WriteLine("Enput any key to stop console output!");
               while(!Console.KeyAvailable)
               {
                   Console.WriteLine(++i);
               }
           }

   static void CancelDemo()
           {
               int i = 0;
               Console.WriteLine("Press ESC to stop");
   
               while (!(Console.KeyAvailable && Console.ReadKey(true).Key == ConsoleKey.Escape))
               {
                   Console.WriteLine(++i);
               }
           }