C#打开或者创建一个文件，然后向其末尾写入数据的方法

            FileStream fs = new FileStream(@"d:\timetick.txt", FileMode.OpenOrCreate, FileAccess.Write);
            StreamWriter m_streamWriter = new StreamWriter(fs);
            m_streamWriter.BaseStream.Seek(0, SeekOrigin.End);
            m_streamWriter.WriteLine(string.Format("Service Start at {0}",DateTime.Now.ToString()));
            m_streamWriter.WriteLine(strTemp);
            m_streamWriter.Flush();
            m_streamWriter.Close();