title: Stripping lines from multiline textbox
body: <p>I have a multiline textbox with text similar to:</p>
  
  <pre><code>Tester Testman
  None
  None
  18 Test Court
  Upper Test
  QLD 4000
  </code></pre>
  
  <p>I'm trying to remove all lines that the word <code>None</code>, I've tried the following:</p>
  
  <pre><code>private void TextBoxShippingLabel_TextChanged(object sender, TextChangedEventArgs e)
  {
      TextBoxShippingLabel.Text = TextBoxShippingLabel.Text.Replace("None", null);
  }
  </code></pre>
  
  <p>However instead of removing the lines this just leaves them empty, so it then looks like the following:</p>
  
  <pre><code>Tester Testman
  
  
  18 Test Court
  Upper Test
  QLD 4000
  </code></pre>
  
  <p>How can I alter my code to remove the lines with that just contain the word "None" entirely? My desired output would be:</p>
  
  <pre><code>Tester Testman
  18 Test Court
  Upper Test
  QLD 4000
  </code></pre>