using System;

using System.Collections.Generic;

using System.Linq;

using System.Text.Json;

​

namespace Namespace

{

    class Program

    {

        static void Main()

        {

            List<MyClass> list1 = new List<MyClass>

            {

                new MyClass { Id = 1, Name = "Item 1" },

                new MyClass { Id = 2, Name = "Item 2" }

            };

​

            List<MyClass> list2 = new List<MyClass>

            {

                new MyClass { Id = 3, Name = "Item 3" },

                new MyClass { Id = 4, Name = "Item 4" }

            };

​

            // Merge the two lists

            List<MyClass> mergedList = list1.Concat(list2).ToList();

​

            // Now, mergedList contains all items from list1 and list2

            foreach (var item in mergedList)

            {

                Console.WriteLine(JsonSerializer.Serialize(item, new JsonSerializerOptions { WriteIndented = true }));

            }

        }

    }

​

    public class MyClass

    {

        public int Id { get; set; }

        public string Name { get; set; }

        // Other properties of your class

    }

}