title: in wpf, how loop output the data in textbox?
body: <p>The following code can only display the last number:</p>
  
  <pre><code>    for (i=0; i&lt;3; i++)
         textbox.text({0},i);
  </code></pre>
  
  <p>But I want to output numbers in textbox like this;</p>
  
  <pre><code>    0
      1
      2
  </code></pre>
  
  <p>How can I do with it? thx.</p>