using System;

using System.Linq;

using System.Collections.Generic;

using Newtonsoft.Json;

using Newtonsoft.Json.Linq;

using  Newtonsoft.Json.Serialization;

​

public class Program

{

    public class Period

    {

        public DateTime Start

        {

            get;

            set;

        }

​

        public DateTime End

        {

            get;

            set;

        }

​

        public int Count

        {

            get;

            set;

        }

​

        public string Foo

        {

            get;

            set;

        }

    }

​

    public class Periodic

    {

        public DateTime Start

        {

            get;

            set;

        }

​

        public DateTime End

        {

            get;

            set;

        }

    }

    public class Tempo

    {

        public Periodic Period

        {

            get;

            set;

        }

​

        public int Value

        {

            get;

            set;

        }

    }

​

    public static void Main()

    {

        var period = new Period{Count = 1, Foo = "bar", Start = DateTime.Now, End = DateTime.Now.AddDays(1)};

        var tempo = new Tempo{Value = 1, Period = new Periodic {Start = period.Start, End = period.End} };

        Console.WriteLine(JsonConvert.SerializeObject(tempo));

    }

}