Serializing complex types using the built-in JSON serializer for NEventStore

I am using NEventStore in an application using CQRS / Event-Sourcing. My WireUp looks like this:

 return NEventStore.Wireup.Init()
               .LogToOutputWindow()
               .UsingInMemoryPersistence()      
               .UsingSqlPersistence("TestConnection") 
               .WithDialect(new MsSqlDialect())
               .EnlistInAmbientTransaction()        
               .InitializeStorageEngine()               
               .UsingJsonSerialization()                             
               .Build();

      

        
        
        
      

    

Serializing events containing built-in simple data types like string and int works fine. However, when I try to serialize an event that uses the structure I have defined, the deserialized value is null.

I will probably have to mark the members of my event with attributes. But what schema does NEventStore use? There are several options in C # (attributes from DataContract Serializer, attributes from XmlSerializer, ...).

I'm also wondering what the serialization limitations are. Does NEventStore require a public empty constructor? Public setters? Or I can use readonly fields (my preference).

I was unable to figure out what the JsonStoreNonStore serializer is using. This seems to be not the same as NetwonSoft as there is a separate nuget package for it.