Effacer fichier texte (ou bloc note)

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;
using System.Diagnostics; 
using System.IO;

namespace WindowsFormsApplication1
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            // Attention!!! Bloc note nommé "Electronique71" 
            StreamWriter writer = new StreamWriter(@"C:\Users\Julien\Desktop\Electronique71.txt", false);
        }         
    }
}