using System;

    using System.Linq;

    using System.Collections.Generic;

    using Newtonsoft.Json;

​

    public class Program

    {

        public static void Main()

        {

            //setup our test data

            var textBox1 = new TextBox("Max1");

            var textBox2 = new TextBox("Max2");

            var textBox3 = new TextBox("Max3");

            var textBox4 = new TextBox("Max4");

​

            //demo using anonymous objects (NB: property names must be known at compile time)

            var data = new object[] {

                new {Name1 = textBox1.Text}

                ,new {Name2 = textBox2.Text}

                ,new {Name3 = textBox3.Text}

                ,new {Name4 = textBox4.Text}

            };

            Console.WriteLine( JsonConvert.SerializeObject(data, Formatting.Indented));

​

            //demo using a dictionary

            var textBoxes = new [] {textBox1, textBox2, textBox3, textBox4};

            var dict = new Dictionary<string,string>();

            for (var i = 0; i< textBoxes.Length; i++) 

            {

                dict.Add(string.Format("Name{0}", i+1), textBoxes[i].Text );

            }

            Console.WriteLine("[" + string.Join(",", dict.Select( e => string.Format("{{\"{0}\": \"{1}\"}}", e.Key.Replace("\"","\"\""), e.Value.Replace("\"","\"\"") ) )) + "]"); //based on https://stackoverflow.com/questions/5597349/how-do-i-convert-a-dictionary-to-a-json-string-in-c/5597628#5597628

        }

    }

​

    //dummy class   

    public class TextBox 

    {

        public TextBox(string text){Text = text;}

        public string Text{get;private set;}

    }

​