Untitled

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="default.aspx.cs" Inherits="_default" %>
<!DOCTYPE html>
<html lang="en">
<body>
<form runat="server">
    <div id="Feedback"></div>
    <div><a href="#" id="ExportButton">Export</a></div>
    <div><a href="#" id="ImportButton">Import</a></div>
</form>
<script src="js/jquery-2.1.1.min.js"></script>
<script>
function Export() {
    $.ajax({
        type: "POST",
        url: 'default.aspx/GetThings',
        contentType: "application/json; charset=u",
        dataType: "json",
        async: true,
        success: function (result) {
            var json = result.d;

            $('#Feedback').html(json);

            // failed attempt #1
            //localStorage["things"] = json;

            // failed attempt #2
            var things = jQuery.parseJSON(json);
            localStorage["things"] = JSON.stringify(things);
        }
    });
}

function Import() {
    $.ajax({
        type: "POST",
        url: "default.aspx/PutThings",
        data: "{'json':'" + localStorage["things"] + "'}",
        contentType: "application/json; charset=u",
        dataType: "json",
        async: true,
        success: function (result) {
            $('#Feedback').html(result.d);
        }
    });
}

$(function () {
    $("#ExportButton").click(function () {
        Export();
    });

    $("#ImportButton").click(function () {
        Import();
    });
});
</script>
</body>
</html>

using System;
using System.Collections.Generic;
using System.Runtime.Serialization;
using System.Text;
using System.Web.Script.Serialization;
using System.Web.Services;
using System.Web.UI;

public partial class _default : Page
{
    [WebMethod]
    public static string GetThings()
    {
        List<Thing> things = new List<Thing>();

        Thing thing = new Thing();
        //thing.Description = "no escaped double quote string works fine";
        thing.Description = "100 (2 1/8") Gear";
        things.Add(thing);

        JavaScriptSerializer serializer = new JavaScriptSerializer();

        StringBuilder json = new StringBuilder();

        serializer.Serialize(things, json);

        return json.ToString();
    }

    [WebMethod]
    public static string PutThings(string json)
    {
        try
        {
            JavaScriptSerializer serializer = new JavaScriptSerializer();

            List<Thing> things = serializer.Deserialize<List<Thing>>(json);

            return things[0].Description;
        }
        catch (Exception e)
        {
            return e.Message;
        }
    }

    public class Thing
    {
        [DataMember]
        public string Description { get; set; }
    }
}