title: Push a stack onto another stack
body: <p>In C#, is there a way to push one Stack onto another Stack without iterating through the stack elements?  If not, is there a better data structure I should be using?  In Java you can do:</p>
  
  <pre><code>stack1.addAll(stack2)
  </code></pre>
  
  <p>I was hoping to find the C# analogue...</p>