System.Text.Json.JsonSerializer.Serialize Empty

[ryanryanorient]

Here is what to include in your request to make sure we implement a solution as quickly as possible.

1. Description

System.Text.Json.JsonSerializer.Serialize return {} .

2. Exception

System.Text.Json.JsonSerializer.Serialize return {} .

3. Fiddle or Project

           // .NET 5 ~ .NET 7

            IList<DynamicProperty> properties = new List<DynamicProperty>();

            properties.Add(new DynamicProperty("A",typeof(string)));

            DynamicClassFactory.CreateType(properties);

            var type = DynamicClassFactory.CreateType(properties);

            var list = new List<DynamicClass>();

            DynamicClass dynamicClass = Activator.CreateInstance(type) as DynamicClass;

            dynamicClass.SetDynamicPropertyValue("A", "A");

            var text = System.Text.Json.JsonSerializer.Serialize(dynamicClass);  // return {},expected {"A":"A"} 

           var text = System.Text.Json.JsonSerializer.Serialize(dynamicClass,typeof(object));  //return {"A":"A"}  OK  What happened?
            
            var text2 = Newtonsoft.Json.JsonConvert.SerializeObject(dynamicClass) //return {"A":"A"}  OK

[StefH]

@ryanryanorient
This seems like a (breaking) change in System.Text.Json?
Did also post your question there?

[StefH]

Solutions for this are:

var text = System.Text.Json.JsonSerializer.Serialize(dynamicClass, typeof(object));

var text = System.Text.Json.JsonSerializer.Serialize(dynamicClass, dynamicClass.GetType());

var text = System.Text.Json.JsonSerializer.Serialize(dynamicClass, type);

#679

[StefH]

Hello @ryanryanorient,

I'm closing this issue for now, can you maybe create an issue in the System.Text.Json GitHub for this?