title: How to change line spacing in TextBlock
body: <p>I am using WPF, there is a TextBlock in my UserControl. The Text is very long, so I wrap it with TextWrapping = Wrap. The question is, how can I change the line spacing?</p>
  
  <p>The code is something like:</p>
  
  <pre><code>&lt;TextBlock Text="abcdefghijklmn" TextWrapping="Wrap"/&gt;
  </code></pre>
  
  <p>The output is like:</p>
  
  <pre><code>abcdefghijk
  lmn
  </code></pre>
  
  <p>What I want is:</p>
  
  <pre><code>abcdefghijk
  &lt;--increase this line spacing--&gt;
  lmn
  </code></pre>
  
  <p>Great Thanks.</p>