c# - windows phone 7 isolated storage - operation not permitted -

so i've been working on simple game , wanted implement highscore system. once player loads main page first time new text file created ("hsc.txt") , fake values inserted later on split program, however, code throws system.io.isolatedstorage.isolatedstorageexception , can't seem find problem. i've looked error got message box "- operation not permitted" solutions posted don't seem work. have tried closing streams doesn't seem work.

any advice highly appreciated.

 private void hashighscores()       {         string filename = "hsc.txt";         using  (var isostorage = isolatedstoragefile.getuserstoreforapplication())         {             if (!isostorage.fileexists(filename))             {                 isostorage.createfile(filename);                         using (var isostream = new isolatedstoragefilestream(filename,   filemode.append, fileaccess.write, isostorage))                     {                         using (var filestream = new streamwriter(isostream))                         {                             filestream.writeline("n1:666,n2:777,n3:888,h1:666,h2:777,h3:888");                             filestream.close();                         }                         isostream.close();                      }             }         }       } 

so far have: a) changed filemode b) changed fileaccess , few other "quickfixes" don't remember.

the createfile method returns stream created file, , keeps open. therefore, when try open stream same file in next line, throws exception because file locked.

you can rewrite code follows:

 private void hashighscores()  {         string filename = "hsc.txt";         using  (var isostorage = isolatedstoragefile.getuserstoreforapplication())         {             if (!isostorage.fileexists(filename))             {                 using (var isostream = isostorage.createfile(filename))                 {                     using (var filestream = new streamwriter(isostream))                     {                         filestream.writeline("n1:666,n2:777,n3:888,h1:666,h2:777,h3:888");                     }                   }             }         }       } 

i've removed stream.close() instructions. close method automatically called when enclose stream in using statement.