问工作并测试了.NET 4的JSon序列化程序？

EN

    public static string SerializeToJSON<T>(T obj)
    {
        string sRet = "";
        var serializer = new System.Runtime.Serialization.Json.DataContractJsonSerializer(typeof(T));
        using (var memStream = new System.IO.MemoryStream())
        {
            serializer.WriteObject(memStream, obj);
            byte[] blob = memStream.ToArray();
            var encoding = new System.Text.UTF7Encoding();
            sRet = encoding.GetString(blob);
        }
        return sRet;
    }