C#：Json数据反序列化为Dictionary并根据关键字获取指定的值

/// <summary>
/// 将json数据反序列化为Dictionary
/// </summary>
/// <param name="jsonData">json数据</param>
/// <returns></returns>
private Dictionary<string, object> JsonToDictionary(string jsonData)
{
    //实例化JavaScriptSerializer类的新实例
    JavaScriptSerializer jss = new JavaScriptSerializer();
    try
    {
        //将指定的 JSON 字符串转换为 Dictionary<string, object> 类型的对象
        return jss.Deserialize<Dictionary<string, object>>(jsonData);
    }
    catch (Exception ex)
    {
        throw new Exception(ex.Message);
    }
}

private void button1_Click(object sender, EventArgs e)
{
    //Json数据
    string json = "{"dataSet":{"header":{"returnCode":"0","errorInfo":"HTTP请求错误","version":"V1.0R010","totalRows":"2000","returnRows":"20"},"fieldDefine":{"assetId":"string","serverIdcId":"int","inputTime":"datetime"},"data":{"row":[{"AssetId":"TCNS2006888","ServerIdcId":"1","InputTime":"2008-12-12"},{"AssetId":"TCNS2006889","ServerIdcId":"2","InputTime":"2008-1-1"}]}}}";
    Dictionary<string, object> dic = JsonToDictionary(json);//将Json数据转成dictionary格式
    Dictionary<string, object> dataSet=(Dictionary<string, object>)dic["dataSet"];
    //使用KeyValuePair遍历数据
    foreach (KeyValuePair<string, object> item in dataSet)
    {
        if (item.Key.ToString() == "header")//获取header数据
        {
            var subItem=(Dictionary<string,object>)item.Value;
            foreach (var str in subItem)
            {
                textBox1.AppendText(str.Key + ":" + str.Value+"
");//显示到界面
            }
            break;
        }
    }
}