public static void log(string content, string path)

        {

            string strFileName = path;

            //判断是否存在

            if (File.Exists(strFileName))

            {

                //存在

                StreamWriter wlog;

                wlog = File.AppendText(strFileName);

                wlog.Write("\r\n{0}", content);

                wlog.Flush();

                wlog.Close();

            }

            else

            {

                //不存在

                FileStream fs1 = new FileStream(strFileName, FileMode.Create, FileAccess.Write);//创建写入文件

                StreamWriter sw = new StreamWriter(fs1);

                sw.WriteLine(content);//开始写入值

                sw.Close();

                fs1.Close();

            }

        }