Serializing Delta <T> to JSON

I have a PATCH API endpoint that receives Delta<T>

, and I need to serialize it, enqueue it, and deserialize it in another process.

Usage JsonConvert.SerializeObject

returns {}

. The incoming Delta<T>

looks correct.

Any idea why Delta<T>

serialize to an empty JSON object?

UPDATE

• Using System.Web.OData.Delta<T>
  
  gives me {}
  
  .
• Usage System.Web.Http.OData.Delta<T>
  
  gives full serialization T
  
  including immutable properties.