title: DateTime.ParseExact() throws exception when trying to parse twitter api created_at
body: <p>I'm using Web API to query Twitter's REST api and I'm trying to parse the <code>created_at</code> value to a <code>DateTime</code> using <code>DateTime.ParseExact(...)</code>:</p>
  
  <pre><code>CreatedAt = DateTime.ParseExact(tweet["created_at"],
                                    "ddd MMM dd HH:mm:ss K yyyy",
                                    CultureInfo.InvariantCulture,
                                    DateTimeStyles.AdjustToUniversal)
  </code></pre>
  
  <p>I get the following exception:</p>
  
  <p>The best overloaded method match for 'System.DateTime.ParseExact(string, string, System.IFormatProvider, System.Globalization.DateTimeStyles)' has some invalid arguments.</p>
  
  <p>An example value of <code>tweet["created_at"]</code> is : Wed Feb 15 19:06:56 +0000 2017</p>