Winphone 刪除文件夾IsolatedStorageFile.DeleteDirectory

Winphone 沒有直接刪除文件夾的接口（由於文件夾不爲空是刪除不了的），因此要本身實現


public static void DeleteDirectoryRecursively(this IsolatedStorageFile storageFile, String dirName){
    String pattern = dirName + @"\*";
    String[] files = storageFile.GetFileNames(pattern);
    foreach (var fName in files)
    {
        storageFile.DeleteFile(Path.Combine(dirName, fName));
    }
    String[] dirs = storageFile.GetDirectoryNames(pattern);
    foreach (var dName in dirs)
    {
        DeleteDirectoryRecursively(storageFile, Path.Combine(dirName, dName));
    }
    storageFile.DeleteDirectory(dirName);}

http://stackoverflow.com/questions/18422331/easy-way-to-recursively-delete-directories-in-isolatedstorage-on-wp7-8