title: Method to serialize a class which contain BitmapImage : using 2 inherited class?
body: <p>When my application closes, I want to serialize some data to make it persistent for the next use of the application. I choose to serialize these data with Newtonsoft.JsonConverter.
  But, I have a BitmapImage in my class, and it can't be serialized.</p>
  
  <p>I'm bit stuck on this because I don't find a solution to keep my BitmapImage into my class (I need to keep it here) and being able to serialize this class.
  I tried to create a inherited class which contains the BitmapImage, but I'm not allowed to create an implicit operator from my base class.</p>
  
  <p>I want to have an object in my class which can be used to be a source for a Image binding, and be able to serialize this class.</p>