Writes a string notepad

    string jsonStr = JsonConvert.SerializeObject(data);
                FileStream stream = new FileStream(@"C:\Users\YeChangZhong\Desktop\新建文件夹\aa.txt", FileMode.Create);//fileMode指定是读取还是写入
                StreamWriter writer = new StreamWriter(stream);
                writer.WriteLine("====================");
                writer.WriteLine(jsonStr);
                writer.WriteLine(data.CREATEUSERNAME);
                writer.WriteLine(data.MODIFYUSERNAME);
                writer.WriteLine("==================== " ); 
                writer.Close (); // free the memory 
                stream.Close (); // release the memory