title: Next key in C# Dictionary
body: <p>How to get an <code>Enumerator</code> to an item in a -Sorted- dictionary using key?</p>
  
  <p><b>Note:</b><code>GetEnumerator()</code> gets an <code>Enumerator</code> to first element..</p>
  
  <p>But I need to get an <code>Enumerator</code> to the element with a given key in order to gain access to next elements using <code>MoveNext()</code> for example...</p>
  
  <p><b>Edit:</b> Or a way to access next elements...</p>
  
  <p><b>Edit:</b> I prefer a const time method...</p>
  
  <p>Thanks</p>