C # simple log Writing Method

A backup is retained, which is used for simple log recording. C #

 private object o = new object (); Private Static string getfiles () {// determines whether a path or file exists, if the resource does not exist, the related resource string dir = appdomain is generated. currentdomain. basedirectory + @ "log \"; if (! Directory. exists (DIR) {directory. createdirectory (DIR);} // set the file name string currtime = datetime. now. tostring ("yyyymm"); Dir + = currtime + ". log "; if (! File. exists (DIR) {filestream FS = file. create (DIR); FS. close () ;}return dir ;}// write the log Private Static void log (string logstr) {lock (o) {string dir = getfiles (); streamwriter Sw = new streamwriter (Dir, true); Sw. writeline (datetime. now. tostring ("yyyy-mm-dd hh: mm: SS") + "" + logstr); Sw. close () ;}