Now, after you know how to run programs, you can test your example programs above, which play musical notes. Have some fun, try these programs out. Try to change them and play with them. Exchange the command
Console.WriteLine("Hello C#"); with the command
Console.Beep(432, 500); and start the program. Check if the sound of your computer is on and whether its turned up. If you work in an online environment, you will not hear a sound, because the program is not executued on your computer, but elsewhere.