Dictionary<string, string> stu = new Dictionary<string, string>();
      stu.Add("id", "1");
      stu.Add("name", "赵大");
      stu.Add("age", "27");
      stu.Add("gender", "男");
      JavaScriptSerializer js = new JavaScriptSerializer();
      string stuJson = js.Serialize(stu);
      Console.WriteLine("使用 JavaScriptSerializer 类序列化得到JSON格式数据：");
      Console.WriteLine(stuJson);

示例：JSON单对象序列化

string deJson = stuJson;
      Dictionary<string, string> deStu = js.Deserialize<Dictionary<string, string>>(deJson);
      Console.WriteLine("使用 JavaScriptSerializer 类将JSON格式数据反序列化指定类：");
      foreach (string s in stu.Keys)
      {
        Console.WriteLine(s.ToString() + "=" + stu[s].ToString());
      }
      Console.ReadLine();

示例：JSON单对象反序列化

function myJson() {
      var stu = { "id": "1", "name": "赵大", "age": "27", "gender": "男", "school": { "class": "03", "teacher": "赵大的老师" } };
      alert("id=" + stu.id + ", " + "name=" + stu.name + ", " + "age=" + stu.age + ", " + "gender=" + stu.gender);
    }

$(document).ready(function () {
      $.ajax({
        url: "AjaxWeb.ashx",
        type: "GET",
        dataType: "JSON",
        success: function (data) {
          var stu = JSON.parse(data);
          alert("id=" + stu.id + ", " + "name=" + stu.name + ", " + "age=" + stu.age + ", " + "gender=" + stu.gender + ", " + "teacher=" + stu.school["teacher"]);
        },
        error: function (e) {
          alert(e.toString());
        }
      })
    })

从后台获取JSON字符串后转化为JSON对象

public void ProcessRequest(HttpContext context)
    {
      context.Response.Write(myJson2());
    }
    private string myJson2()
    {
      string json = " {\"id\": \"1\", \"name\": \"赵大\", \"age\": \"27\", \"gender\": \"男\", \"school\": { \"class\": \"03\", \"teacher\": \"赵大的老师\" }}";
      JavaScriptSerializer js = new JavaScriptSerializer();
      json = js.Serialize(json);
      return json;
    }

后台处理文件代码