title: Prevent RichTextBox from creating new line when enter is pressed
body: <p>I want to run a method when the <kbd>Enter</kbd> key is pressed within a <code>RichTextBox</code> so I made this code.</p>
  
  <pre><code>private void richTextBox1_KeyDown(object sender, KeyEventArgs e)
  {
      if (e.KeyCode == Keys.Enter)
          MessageBox.Show("Hello World");
  }
  </code></pre>
  
  <p>But I don't want to make a new line when the <kbd>Enter</kbd> key is pressed. But I can't manage to make that work.</p>