title: How add Event EventHandler in xaml?
body: <p>I have custom Picker with property</p>
  
  <pre><code>public EventHandler SelectedIndexChanged { get; set; }
  </code></pre>
  
  <p>and i want set this property from xaml. 
  like this  <code>GenderPicker.SelectedIndexChanged += GenderPicker_OnSelectedIndexChanged;</code>
   but from xaml</p>
  
  <pre><code>    &lt;elements:CustomPicker 
    SelectedIndexChanged="{What write there???}"/&gt;
  </code></pre>