using System;

using System.Linq;

using System.Collections.Generic;

using System.Collections.Specialized;

using Newtonsoft.Json;

public class Program

{

    public static void Main()

    {

        // init with even numbers

        string jsonString = @"{" +

            "\"Product\": \"123\"," +

            "\"to_Description\": [" +

                "{" +

                    "\"ProductDescription\": \"Product 1\"" +

                "}" +

            "]" +

        "} ";

        var src = JsonConvert.DeserializeObject<Source>(jsonString);

        var dest = new Destination

        {

            Product = src.Product,

            To_Description = src.To_Description[0]

        };

        var newJson = JsonConvert.SerializeObject(dest);

        Console.WriteLine(newJson);

    }

}

​

​

public class Source

{

   public string Product {get;set;}

   public List<Dictionary<string,string>> To_Description{get;set;}

}

​

​

public class Destination

{

   public string Product {get;set;}

   public Dictionary<string,string> To_Description{get;set;}

}