HI1Object.cs

namespace PolymorphicDeSerialization.Models
{
    public class HI1Object
    {
        public string ObjectIdentifier { get; set; }
        public int Generation { get; set; }

        // This serves the same purpose as the "typeDiscriminator" field.
        // I've called it xsiType because in OAS3 we can map the XSD xsiType
        // field (which is essentially XML's type discriminator) directly to JSON.
        // This just uses the .NET type name because it's just a demo and
        // I'm too lazy to actually map to the correct Qnames here.
        public string xsiType { get => this.GetType().ToString(); }
        public void ToString()
        {
            Console.WriteLine(this.GetType().Name);
        }
    }
}