using System;

using System.Collections.Generic;

using Newtonsoft.Json;

public class Program

{

    public static void Main()

    {

        DataMapList dml = new DataMapList();

        string json = JsonConvert.SerializeObject(dml, Formatting.Indented);

        Console.WriteLine(json);

    }

}

​

[JsonObject]

[JsonConverter(typeof(DataMapListSerializer))]

public class DataMapList

{

    public List<Dictionary<object, object>> employeeSalaryMappingList = null;

    public DataMapList()

    {

        employeeSalaryMappingList = new List<Dictionary<object, object>>();

        employeeSalaryMappingList.Add(new Dictionary<object, object>());

        employeeSalaryMappingList[0].Add(1, 10000);

        employeeSalaryMappingList[0].Add(2, 13000);

        employeeSalaryMappingList[0].Add(3, 15000);

        employeeSalaryMappingList.Add(new Dictionary<object, object>());

        employeeSalaryMappingList[1].Add(4, 9000);

        employeeSalaryMappingList[1].Add(5, 12000);

        employeeSalaryMappingList[1].Add(6, 11000);

    }

}

​

public class DataMapListSerializer : JsonConverter

{

    public override void WriteJson(JsonWriter writer, object value, JsonSerializer serializer)

    {

        var employeeSalaryDataMapList = value as DataMapList;

        var employeeSalaryMappingList = employeeSalaryDataMapList.employeeSalaryMappingList;

        writer.WriteStartArray();

        foreach (var employeeSalaryMappingDictionary in employeeSalaryMappingList)

        {

            writer.WriteStartObject();

                writer.WritePropertyName("ED");

                writer.WriteStartObject();

                foreach (var keyValuePair in employeeSalaryMappingDictionary)

                {

                    writer.WritePropertyName("ID-" + keyValuePair.Key);

                    serializer.Serialize(writer, keyValuePair.Value);

                }

                writer.WriteEndObject();

            writer.WriteEndObject();

        }

        writer.WriteEndArray();

    }       

    public override bool CanConvert(Type objectType)

    {

        return typeof(DataMapList).IsAssignableFrom(objectType);

    }

    public override object ReadJson(JsonReader reader, Type objectType, object existingValue, JsonSerializer serializer)

    {

        throw new NotImplementedException();

    }

}