c# - threading in Filewatcher window service -

i have written window service uses filewatcher monitor creation of file in particular folder.however,my question in real environment,many files (approx 20-30) comes in folder in production environment.how should handle such huge data files.do need implememt threading or something.for threading,any sample code appreciated not sure how do. code below:

protected override void onstart(string[] args) {             xmldocument xml = new xmldocument();     xml.load("c:\\users\\\\data.xml");      xmlnodelist xnlist = xml.selectnodes("/names/name");     foreach (xmlnode xn in xnlist)     {         strdir = xn["directory"].innertext;         filemask = xn["filemask"].innertext;         strbatfile = xn["batch"].innertext;         strlog = xn["log"].innertext;      }      m_watcher = new filesystemwatcher();       m_watcher.filter = filemask;     m_watcher.path = strdir+ "\\";     m_watcher.notifyfilter = notifyfilters.lastaccess | notifyfilters.lastwrite                      | notifyfilters.filename | notifyfilters.directoryname;       m_watcher.created += new filesystemeventhandler(oncreated);      m_watcher.deleted += new filesystemeventhandler(ondeleated);     m_watcher.renamed += new renamedeventhandler(onrenamed);       m_watcher.enableraisingevents = true;    } 

handler code below:

private static void oncreated(object source, filesystemeventargs e) {     log.getlogger("file created- filename :" + e.name + " @ timestamp : " + datetime.now.tostring(), strlog);     string strfileext = e.name;      var extension = path.getextension(strfileext).toupper();     try     {         if (extension == ".txt")         {             string mybatchfile = strbatfile;             string parameterfilename = strfileext;             system.diagnostics.process.start(mybatchfile);              log.getlogger("file processed after executing batch:  filename ->:" + e.name + " " + "batch file executed- > " + strbatfile + " @ timestamp : " + datetime.now.tostring(), strlog);         }     }     catch (exception exception)     {         customexception.write(customexception.createexceptionstring(exception, strfileext));     }         {         m_watcher.enableraisingevents = true;     } } 

question2-

what best practice write in onstop() method.

i found workaround thought post it.

    protected override void onstart(string[] args)     {           current_directory = path.getdirectoryname(assembly.getexecutingassembly().location);         xmldocument xml = new xmldocument();         try         {               string xml_path = system.appdomain.currentdomain.basedirectory;              xml.load(current_directory+"\\data.xml");//suppose myxmlstring contains "<names>...</names>"                   xmlnodelist xnlist = xml.selectnodes("/names/name");                  foreach (xmlnode xn in xnlist)                  {                      strdir = xn["directory"].innertext;                      filemask = xn["filemask"].innertext;                      strbatfile = xn["batch"].innertext;                      strlog = xn["log"].innertext;                    }              m_watcher = new filesystemwatcher();               m_watcher.filter = filemask;             m_watcher.path = strdir + "\\";             m_watcher.notifyfilter = notifyfilters.lastaccess | notifyfilters.lastwrite                              | notifyfilters.filename | notifyfilters.directoryname;                 m_watcher.created += new filesystemeventhandler(oncreated);              m_watcher.deleted += new filesystemeventhandler(ondeleated);             m_watcher.renamed += new renamedeventhandler(onrenamed);               m_watcher.enableraisingevents = true;         }         catch (exception exception)         {             customexception.write(customexception.createexceptionstring(exception.tostring()));         }      }