private static void WriteFilesRecursiveToZip(ZipArchive archive, IStorage storage, string basePath)
{
string searchPattern = basePath;
string[] fileNames = storage.GetFileNames(searchPattern);
foreach (string fileName in fileNames)
{
Stream fileStream = storage.OpenFile(basePath + "/" + fileName, StorageFileMode.Open,
StorageFileAccess.Read);
archive.AddEntry(fileName, fileStream);
}
string[] directrryNames = storage.GetDirectoryNames(searchPattern);
foreach (string directoryName in directrryNames)
{
WriteFilesRecursiveToZip(archive, storage, basePath + "/" + directoryName);
}
}