using System;

using Newtonsoft.Json;

using System.Collections.Generic;

​

public class CreateDocument

{

    public static void Main(string[] args)

    {

        Console.WriteLine("Inline   : " + ConvertToJson());

        Console.WriteLine("Expanded : " + JsonConvert.DeserializeObject(ConvertToJson()));

    }

​

    public class Field

    {

        public string Name { get; internal set; }

​

        public FieldValues MyField { get; internal set; }

​

        public class FieldValues

        {

            public string Value { get; internal set; }

​

            public string Key { get; internal set; }

​

            public FieldValues(string value, string key)

            {

                Value = value;

                Key = key;

            }

        }

​

        public Field(string name, FieldValues myField)

        {

            Name = name;

            this.MyField = myField;

        }

    }

​

    private class Document

    {

        //other properties ...

        public List<Field> Fields { get; internal set; }

    }

​

    internal static string ConvertToJson()

    {

        Document document = new Document();

​

        List<Field> myFields = new List<Field>();

        //pretend foreach (){...}

        myFields.Add(new Field("field1", new Field.FieldValues("value1", "value2")));

        myFields.Add(new Field("field2", new Field.FieldValues("value3", "value4")));

​

        document.Fields = myFields;

        return JsonConvert.SerializeObject(document);

    }

}