using System;

using JsonSubTypes;

using Newtonsoft.Json;

using System.Collections.Generic;

​

public class Program

{

    [JsonConverter(typeof(JsonSubtypes), "type")]

    [JsonSubtypes.KnownSubType(typeof(ChildInteger), "Integer")]

    [JsonSubtypes.KnownSubType(typeof(ChildDateTime), "DateTime")]

    public abstract class Child

    {

        [JsonProperty("type")]

        public virtual string Type

        {

            get;

        }

​

        public string Name

        {

            get;

            set;

        }

​

        public abstract string GetValue();

    }

​

    public class ChildInteger : Child

    {

        public override string Type => "Integer";

        public int Value

        {

            get;

            set;

        }

​

        public override string GetValue() => Value.ToString();

    }

​

    public class ChildDateTime : Child

    {

        public override string Type => "DateTime";

        public DateTime Value

        {

            get;

            set;

        }

​

        public override string GetValue() => Value.ToString();

    }

​

    public static void Main()

    {

        var input = "[{\"Value\":1,\"Name\":\"Child Integer 1\",\"Type\":\"Integer\"},{\"Value\":\"2020-08-31T08:29:11.9002559+05:30\",\"Name\":\"Child DateTime 1\",\"Type\":\"DateTime\"}]";

        var results = JsonConvert.DeserializeObject<List<Child>>(input);

        foreach (var item in results)

            Console.WriteLine($"{item.Name}, {item.GetValue()}");

    }

}