title: Can't paste all text in wpf textbox
body: <p>I have a simple window and textbox, when i try to paste this code to the textbox</p>
  
  <pre><code>[Code]General           : sample.avi
  Format            : AVI
  Length            : 380 MiB for 16mn 57s 320ms
  
  Video #0          : DivX 5 at 2994 Kbps
  Aspect            : 1024 x 576 () at 25.000 fps
  
  Audio #0          : MPEG-1 Audio layer 3 at 128 Kbps
  Infos             : 2 channels, 48.0 KHz   [/code]
  </code></pre>
  
  <p>It stops after</p>
  
  <pre><code>[Code]General           : sample.avi
  </code></pre>
  
  <p>Why?</p>