title: What does this colon (:) mean?
body: <p>Before the <code>this</code> keyword is a colon. Can anyone explain what the colon means in this context? I don't believe this is inhertance. </p>
  
  <p>Thanks</p>
  
  <pre><code>using System;
  
  namespace LinkedListLibrary
  {
      class ListNode
      {
          private object data;
          private ListNode next;
  
          public ListNode(object dataValue)
              : this(dataValue, null)
          {
          }
  
          public ListNode(object dataValue, ListNode nextNode)
          {
              data = dataValue;
              next = nextNode;
          }
  
          public ListNode Next
          {
              get
              {
                  return next;
              }
              set
              {
                  next = value;
              }
          }
          public object Data
          {
              get
              {
                  return data;
              }
          }
  
  
      }
  }
  </code></pre>