title: convert date format to YYYY-MM-DD of raddatepicker value
body: <p>I am trying to convert the value of raddatepicker to YYYY-MM-DD format. But I am getting exception, </p>
  
  <pre><code>orderDate.SelectedDate = DateTime.Now.Date;   // Date = {15/7/2015 12:00:00 AM}
  string orderDate_ = orderDate.SelectedDate.Value..ToShortDateString();  // 15/7/2015
  
  IFormatProvider culture = new CultureInfo("en-US", true);
  DateTime dateVal = DateTime.ParseExact(orderDate_, "yyyy-MM-dd", culture);  // geting exception [System.FormatException] = {"String was not recognized as a valid DateTime."}
  </code></pre>
  
  <p>Getting exception </p>
  
  <pre><code>[System.FormatException] = {"String was not recognized as a valid DateTime."}
  </code></pre>
  
  <p>Please suggest how to convert the date format to yyyy-MM-dd.</p>