using System;

using System.Collections.Generic;

using System.Linq;

using Newtonsoft.Json;

public class Program

{

    public static void Main()

    {

        var example1 = new MyPerson {

            FirstName = "Bob",

            DateOfBirth = Convert.ToDateTime("1979-03-01")      

        };

        var json1 = JsonConvert.SerializeObject(example1.CreateModel());

        Console.WriteLine(json1);

        var example2 = new List<Foo>()

        {

            new Foo() { Param1 = "aaa", Param2 = "bbb" },

            new Foo() { Param1 = "ccc", Param2 = "ddd" }

        };

        var json2 = JsonConvert.SerializeObject(example2.CreateModels());

        Console.WriteLine(json2);

    }

}

​

public class MyPerson

{

    public string FirstName { get; set; }

    public DateTime DateOfBirth { get; set; }

}

​

public class Foo

{

    public string Param1 { get; set; }

    public string Param2 { get; set; }

}

​

public static class JsonExtensions

{

    public static object CreateModels<T>(this IEnumerable<T> models, string modelName = null)

    {

        modelName = modelName ?? typeof(T).Name+"Collection";

​

        return new Dictionary<string, object>()

        {

            { modelName, models.Select(m => CreateModel(m)) }

        };

    }

​

    public static IDictionary<string, object> CreateModel<T>(this T model, string modelName = null)

    {

        modelName = modelName ?? typeof(T).Name;

​

        return new Dictionary<string, object>()

        {

            { modelName, GetProperties(model) }

        };

    }

​

    private static IDictionary<string, object> GetProperties<T>(T obj)

    {

        var props = typeof(T).GetProperties();

        return props.ToDictionary(p => p.Name, p => (object)new { type = p.PropertyType.ToString(), value = p.GetValue(obj, null).ToString() });

    }

}