title: LINQ Distinct operator, ignore case?
body: <p>Given the following simple example:</p>
  
  <pre><code>    List&lt;string&gt; list = new List&lt;string&gt;() { "One", "Two", "Three", "three", "Four", "Five" };
  
      CaseInsensitiveComparer ignoreCaseComparer = new CaseInsensitiveComparer();
  
      var distinctList = list.Distinct(ignoreCaseComparer as IEqualityComparer&lt;string&gt;).ToList();
  </code></pre>
  
  <p>It appears the CaseInsensitiveComparer is not actually being used to do a case-insensitive comparison.  </p>
  
  <p>In other words <strong>distinctList</strong>  contains the same number of items as <strong>list</strong>.   Instead I would expect, for example, "Three" and "three" be considered equal.</p>
  
  <p>Am I missing something or is this an issue with the Distinct operator?</p>