using System;

using System.Collections;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Runtime.Serialization.Formatters;

using System.IO;

using System.Data;

using System.ComponentModel.DataAnnotations;

using System.Globalization;

using System.Collections.ObjectModel;

using System.Reflection;

​

using Newtonsoft.Json;

using Newtonsoft.Json.Linq;

using Newtonsoft.Json.Converters;

using Newtonsoft.Json.Serialization;    

​

    //https://stackoverflow.com/questions/49460068/how-to-create-a-object-of-the-same-user-definedtype-passed-into-a-generic-meth

    public abstract class Card

    {

        public int Index { get; private set; }

        public string Front { get; private set; }

        public string Back { get; private set; }

​

        public Card(int index, string front, string back)

        {

            this.Index = index;

            this.Front = front;

            this.Back = back;

        }

    }

​

    public class FearCard : Card

    {

        public FearCard(int index, string front, string back) : base(index, front, back) { }

    }

​

    public class EventCard : Card

    {

        public EventCard(int index, string front, string back) : base(index, front, back) { }

    }

​

    public class InvaderCard : Card

    {

        public InvaderCard(int index, string front, string back) : base(index, front, back) { }

    }

​

    public class BlightCard : Card

    {

        public BlightCard(int index, string front, string back) : base(index, front, back) { }

    }

​

    internal static class CardExtensions

    {

        public static T CreateCard<T>(int index, string front, string back) where T : Card

        {

            return (T)Activator.CreateInstance(typeof(T), index, front, back);

        }

    }

    internal static class MyExtensions

    {

        public static T CreateDeck<T>(this ObservableCollection<T> deck, int index, string front, string back) where T : Card

        {

            if (deck == null)

                throw new ArgumentNullException();

            var card = CardExtensions.CreateCard<T>(index, front, back);

            deck.Add(card);

            return card;

        }

    }

​

    class TestClass

    {

        public static void Test()

        {

            var query = typeof(Card).Assembly.GetTypes()

                .Where(t => !t.IsAbstract && typeof(Card).IsAssignableFrom(t));

            foreach (var type in query)

            {

                typeof(TestClass).GetMethod("GenericTest", BindingFlags.Static | BindingFlags.NonPublic | BindingFlags.Public).MakeGenericMethod(new[] { type }).Invoke(null, null);

            }

        }

​

        static void GenericTest<T>() where T : Card

        {

            var deck = new ObservableCollection<T>();

            var card = deck.CreateDeck(0, "yes", "no");

​

            Console.WriteLine("Created deck of {0}", typeof(T));

            Console.WriteLine(Newtonsoft.Json.JsonConvert.SerializeObject(deck));

        }

    }

​

    public class FlarbCard : Card

    {

        public FlarbCard(int index, string front, string back) : base(index, front, back) { }

        public string SomeOtherProperty = "some other property value";

    }

​

    public class Program

    {

        public static void Main()

        {

            Console.WriteLine("Environment version: " + Environment.Version);

            Console.WriteLine("Json.NET version: " + typeof(JsonSerializer).Assembly.FullName);

            Console.WriteLine();

​

            try

            {

                TestClass.Test();

            }

            catch (Exception ex)

            {

                Console.WriteLine("Failed with unhandled exception: ");

                Console.WriteLine(ex);

                throw;

            }

        }

    }

​

    public class AssertionFailedException : System.Exception

    {

        public AssertionFailedException() : base() { }

​

        public AssertionFailedException(string s) : base(s) { }

    }

​

    public static class Assert

    {

        public static void IsTrue(bool value)

        {

            IsTrue(value, "failed");

        }

​

        public static void IsTrue(bool value, string message)

        {

            if (value == false)

                throw new AssertionFailedException(message ?? "failed");

        }

    }

​