title: Get ListView items that are checked
body: <p>I have listview with combox=true containg images. Each item is assigned a tag.
  I can get tag of focussed item:</p>
  
  <pre><code>string name = this.lstview1.FocusedItem.Tag.ToString();
  </code></pre>
  
  <p>I can get index of checked item:</p>
  
  <pre><code>  list = lstview1.CheckedIndices.Cast&lt;int&gt;().ToList();
  </code></pre>
  
  <p>How do I get the tag of the checked item?</p>