Code: using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Text; using System.Windows.Forms; using System.Configuration; using MySql.Data.MySqlClient; using System.Data.SqlClient; namespace kayıt_program { public partial class Form1 : Form { public Form1() { InitializeComponent(); } private void button3_Click(object sender, EventArgs e) { baglantı.aç StreamWriter ahm = File.AppendText("csdosyaislemleri.txt"); ahm.WriteLine(textBox1.Text + "$" + textBox2.Text + "$" + textBox3.Text); ahm.Flush(); ahm.Close(); int i = 0; try { using (streamReader sr = new Stream()) Reader("text.txt"); { string line; while ((line = sr.Readline()) != null) { listBox1.Items.Add(line); } } } catch { MessageBox.Show("Hata Meydana Geldi"); } but++; } } }