Immutable entities with Raven DB

Whenever you are trying to use a non-default constructor for your entity, do the following to avoid falling into serialization problems with JSON.Net and raven:

• add a private constructor ... even if it is empty
• Ensure every readonly property has a "Private setter" on it ... else it won't get populated
• Use a custom Json resolver like this one:

public class PrivatePropertySetterResolver : DefaultContractResolver
{
   protected override JsonProperty CreateProperty(JsonObjectContract contract, MemberInfo member)
   {
       var prop = base.CreateProperty(contract, member);
       if (!prop.Writable)
       {
           var property = member as PropertyInfo;
           if (property != null)
           {
               var hasPrivateSetter = property.GetSetMethod(true) != null;
               prop.Writable = hasPrivateSetter;
           }
       }
       return prop;
   }
}