Това е SourceCode-да.Добре ли е като за начинаещ!!https://sites.google.com/site/vipsisterc/ Сайта на който качих приложението

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace WindowsPiano
{
    public partial class WindowsPiano : Form
    {
        public WindowsPiano()
        {
            InitializeComponent();
        }

        private void Do_Click(object sender, EventArgs e)
        {
            Console.Beep(200, 200);
           
        }

        private void dr_Click(object sender, EventArgs e)
        {
            Console.Beep(300, 200);
        }

        private void Re_Click(object sender, EventArgs e)
        {
            Console.Beep(400, 300);
        }

        private void rm_Click(object sender, EventArgs e)
        {
            Console.Beep(500, 200);
        }

        private void Mi_Click(object sender, EventArgs e)
        {
            Console.Beep(600, 200);
        }
    }
}