using Newtonsoft.Json.Linq;
using System.Collections.Generic;
using System.Transactions;
public static void Main()
List<Dictionary<string, string>> Result = new List<Dictionary<string, string>>();
var columns = new Dictionary<string, string>
{ "FirstName", "Mathew"},
{ "Surname", "Thompson"},
{ "SerializeMe", "GoOnThen"}
var jsonString = JsonConvert.SerializeObject(Result);
Console.WriteLine(jsonString);