title: Convert string to specific date format C#
body: <p>I have a problem to convert string to date format in C#.
  I'm getting the data through a row of a gridview:</p>
  
  <pre><code>string shipping_date = row["Shipping_Date"].ToString();
  </code></pre>
  
  <p>with format: 27/08/2015 00:00:00 but want convert to the format "yyyyMMdd". </p>
  
  <p>Already used the method DateTime.TryParse, but without success...
  After getting the date, it is to extract to a txt file (which I have to work). I've seen some identical issues here, but none worked for me.</p>
  
  <p>Someone can help me convert to "yyyyMMdd"?</p>
  
  <p>Thanks</p>