title: Copy collection items to another collection in .NET
body: <p>In .NET (VB), how can I take all of the items in one collection, and add them to a second collection (without losing pre-existing items in the second collection)? I'm looking for something a little more efficient than this:</p>
  
  <pre><code>For Each item As Host In hostCollection1
      hostCollection2.Add(item)
  Next
  </code></pre>
  
  <p>My collections are generic collections, inherited from the base class -- Collection(Of )</p>