title: How to tweak default JSON serializer in WCF REST
body: <p>WCF REST service works great in a way that it will reply/accept JSON or XML depending on header.</p>
  
  <p>I want to tweak built-in JSON serializer a little so it encodes/decodes Byte[] little different. More specifically, I want to use Base64 for that. </p>
  
  <p>Is that any pointers/samples where I can set custom type serializer that will affect whole service?</p>