title: Add axis name into chart c#
body: <p>I'm working with <em>winforms</em> using C#.</p>
  
  <p>I use chart and I want to set the titles of the X- and Y-axis in code. I tried</p>
  
  <pre><code>chart1.chartarea(0).axisX.title = "xxx" 
  </code></pre>
  
  <p>but it does't work and I don't know why.</p>