using System;

using System.Collections.Generic;

using System.Dynamic;

using Newtonsoft.Json;

using Newtonsoft.Json.Converters;

​

public class Program

{

    public static void Main()

    {

        const string json = @"[

    {

        ""orgId"": 1,

        ""oprId"": 1,

        ""productCode"": 143654,

        ""stockId"": 122104,

        ""batchId"": 122104,

        ""rateId"": 122104,

        ""shortName"": ""SME"",

        ""batchNo"": ""150419"",

        ""expiryDate"": ""2022-05-28"",

        ""mrp"": 60.0,

        ""saleRate"": 60.0,

        ""purchaseRate"": 13.74,

        ""quantity"": 500.0,

        ""storeName"": ""Main Store"",

        ""newMrp"": null,

        ""newSaleRate"": null,

        ""newExpiryDate"": null,

        ""newShortName"": null,

        ""createdby"": null,

        ""status"": null

    },

    {

        ""orgId"": 1,

        ""oprId"": 1,

        ""productCode"": 143654,

        ""stockId"": 2018030010140000053,

        ""batchId"": 2018030010200000033,

        ""rateId"": 122104,

        ""shortName"": null,

        ""batchNo"": ""220"",

        ""expiryDate"": null,

        ""mrp"": 60.0,

        ""saleRate"": 0.0,

        ""purchaseRate"": 13.74,

        ""quantity"": 10.0,

        ""storeName"": null,

        ""newMrp"": null,

        ""newSaleRate"": null,

        ""newExpiryDate"": null,

        ""newShortName"": null,

        ""createdby"": null,

        ""status"": null

    }

]";

        var jsonSettings = new JsonSerializerSettings()

        {

            DefaultValueHandling = DefaultValueHandling.Ignore,

            Formatting = Newtonsoft.Json.Formatting.Indented,

            TypeNameHandling = TypeNameHandling.All,

            NullValueHandling = NullValueHandling.Include,

            Converters = { new ExpandoObjectConverter() }

        };

        var dataList = JsonConvert.DeserializeObject<List<ExpandoObject>>(json, jsonSettings);

        foreach (IDictionary<string, object> item in dataList)

        {

            object value;

            if (item.TryGetValue("newSaleRate", out value))

            {

                Console.WriteLine("Property exists: value = {0}", value == null ? "NULL" : value);

            }

            else

            {

                Console.WriteLine("Property does not exist.");

            }

        }

    }

}