C# is exists unallowed files -

i have folder these files:

• file1.exe
• file2.dll

i want check exists extraneous files in folder. example if create examplefile.exe in folder must give me error, there must files listed above. i've created needed files string:

string[] only_these_files = {      "file1.exe",      "file2.dll" }; 

now need search extraneous files, how to? immediately.

i'm tried code, don't know how check it.

string[] only_these_files = {              "image1.png",              "image2.png",              "image3.png",             "image4.png",             "image5.png"         };         string[] fileentries = directory.getfiles(@"c:\users\dewagg\desktop\test\");          list<string> badfiles = new list<string>();          foreach (string filename in fileentries)             if (!only_these_files.contains(filename))             {                 badfiles.add(filename);             } 

it's not rocket science: you:

hashset<string> allowedfiles = new hashset<string>( stringcomparer.ordinalignorecase ) {   "file1.exe" ,   "file2.dll" , }; directoryinfo directory = new directoryinfo( @"c:\foo\bar" ) ;  bool containsnonallowedfiles = directory                                .enumeratefiles( @"c\foo\bar" )                                .any( fi => !allowedfiles.contains( fi.name ) )                                ; bool containsallallowedfiles = allowedfiles                                .all( fn => directory.enumeratefiles( fn ).any() )                                ;