c# - Checking whether the current WPF app is running or not? -

how check programmatically whether wpf app working or not right now?, app.previnstance in vb. please suggest me simple method, beginner.

here code,

protected override void onstartup(startupeventargs e) {     base.onstartup(e);     var runningprocessbyname = process.getprocessesbyname("tclcgfp");     if (runningprocessbyname.length == 0)     {         //process.start("tclcgfp.exe");         new traacsclcprocess();     }     else     {         messagebox.show("application running.","tclcgfp",messageboxbutton.ok,messageboximage.information);     }     environment.exit(0); } 

it showing application running :p

what people use named mutex object. use constructor overload tells if created find out if process has created 1 same name. example using mutex:

mutex mutex;  try {    mutex = mutex.openexisting("singleinstance");     if (mutex!= null)    {          console.writeline("error, 1 instance only");          application.exit();     }  }  catch (waithandlecannotbeopenedexception ex)  {         mutex  = new mutex(true, "singleinstance");  } 

you can read how determine if previous instance of application running?