public void WriteStreamToFileSync(Stream dataStream, string fileName, string folderName = null) { // Ensure crashes folder exists if (!isoStore.DirectoryExists(folderName)) { isoStore.CreateDirectory(folderName); } using (var fileStream = isoStore.OpenFile((folderName ?? "") + Path.DirectorySeparatorChar + fileName, FileMode.Create, FileAccess.Write)) { dataStream.CopyTo(fileStream); } }