title: Convert hash to a hexadecimal character string
body: <p>on this page:</p>
  
  <p><a href="http://www.shutterfly.com/documentation/OflyCallSignature.sfly" rel="noreferrer">http://www.shutterfly.com/documentation/OflyCallSignature.sfly</a></p>
  
  <p>it says once you generate a hash you then:</p>
  
  <p><strong>convert the hash to a hexadecimal character string</strong></p>
  
  <p>is there code in csharp to do this?</p>