title: Convert DateTime Format c#
body: <p>I would like to Convert the string in DateTime format</p>
  
  <pre><code>CultureInfo cultureInfoProvider = new CultureInfo("en-US");  
  var lastUpdatedDate = updatedVAlue.Max();   //value is 20150219T045452:635599184921416348  
  DateTime dt = DateTime.ParseExact(lastUpdatedDate,"yyyyMMddTHHmmss:fff",cultureInfoProvider);
  </code></pre>
  
  <p>I'm getting an exception 
  String was not recognized as a valid DateTime.</p>