 title="FSharpx.Collections.T">T</span> <strong>Head</strong> get; </h4>
    <div class="content">O(log n). Returns the first element. 
      
    </div>
  </div>
  <div id="IsEmpty" class="method">
    <h4><span title="System.bool">bool</span> <strong>IsEmpty</strong> get; </h4>
    <div class="content">O(1). Returns true if the DList has no elements. 
      
    </div>
  </div>
  <div id="Length" class="method">
    <h4><span title="System.int">int</span> <strong>Length</strong> get; </h4>
    <div class=