c# - how to convert any date format to yyyy-MM-dd
<p>My app parses a string data, extracts the date and identify the format of the date and convert it to yyyy-MM-dd.</p>

<p>The source date could be anything lime dd-mm-yyyy, dd/mm/yyyy, mm-dd-yyyy, mm/dd/yyyy or even yyyy-MM-dd.</p>

<p>Other than attempting different permutations and combinations using switch case, is there any other efficient way to do it?</p>

<pre><code>string sourceDate = "31-08-2012";
String.Format("{0:yyyy-MM-dd}", sourceDate);
</code></pre>

<p>The above code simply returns the same sourceDate "31-08-2012".</p>
