title: How to code in save button?
body: <p>I Have used five text box and i want to save all contents in textbox into a single file with save  button using C#.</p>
  
  <pre><code>private void textBox1_TextChanged(object sender, EventArgs e) {
  }
  private void textBox2_TextChanged(object sender, EventArgs e) {
  }
  private void textBox3_TextChanged(object sender, EventArgs e) {
  }
  private void textBox4_TextChanged(object sender, EventArgs e) {
  }
  private void textBox5_TextChanged(object sender, EventArgs e) {
  }
  private void button2_Click(object sender, EventArgs e) {
  }
  </code></pre>