/// <summary>

        /// 输出指定信息到文本文件

        /// </summary>

        /// <param name="msg">输出信息</param>

        public static void WriteMessage(string msg)

        {

            using (FileStream fs = new FileStream(@"d:\test.txt", FileMode.OpenOrCreate, FileAccess.Write))

            {

                using (StreamWriter sw = new StreamWriter(fs))

                {

                    sw.BaseStream.Seek(, SeekOrigin.End);

                    sw.WriteLine("{0}\n", msg, DateTime.Now);

                    sw.Flush();

                }

            }

        }