c# - What does args 0 store in this program -

what code in example, args[0] store? if want access path directory, can not though i'm pretty sure im making mistake on same line.

string directorypath = args[0]; 

this code:

class program     {         static void main(string[] args)         {                  string directorypath = args[0];                 string[] fileslist, fileslisttmp;                 ifileoperation[] oplist = { new fileprocnameafter10(),                                             new fileprocenc(),                                             new fileprocbyext("jpeg"),                                             new fileprocbyext("jpg"),                                             new fileprocbyext("doc"),                                             new fileprocbyext("pdf"),                                             new fileprocbyext("djvu")                                             };                 if (directory.exists(directorypath))                 {                     fileslist = directory.getfiles(directorypath);                     while (true)                     {                         thread.sleep(500);                         fileslisttmp = directory.getfiles(directorypath);                         foreach (var elem in enumerable.except<string>(fileslisttmp, fileslist))                         {                             console.writeline(elem);                             foreach (var op in oplist)                             {                                 if (op.accept(elem)) op.process(elem);                             }                         }                         fileslist = fileslisttmp;                         if (console.keyavailable == true && console.readkey(true).key == consolekey.escape) break;                     }                 }                 else                 {                     console.writeline("there no such directory.");                     console.readkey();                  }           }     } 

what args 0 store in program

its command line parameter, value in if execute exe command line parameters.

for debugging purpose can send through visual studio well, go project properties, debug , under start option specify.