public bool FileExists$($string filename, string directory$)$

$\{$

DirectoryInfo dir $=$ new DirectoryInfo$($directory$)$;

var directories$=$ di$.$GetFiles$("*",$ SearchOption.AllDirectories$)$;

foreach $($FileInfo file in dir.GetFiles$())$

if $($file$.$Name.ToLower$()==$ filename$)$

return true;

foreach$($DirectoryInfo subdir in dir.GetDirectories$())$

FileExists$($subdir$.$FullName, filename$)$;

return false;

$\}$