private IFakeFile CreateArchiveFile(DateTime date, string base64Content)
{
DateTime now = _now;
_now = date; // By setting the "_now" the virtual file will have the correct time stamp.
var file = _fileSystem.SetFileFromBase64(LOG_DIR + $"Archived_{date:yyyyMMdd}.zip", base64Content);
_now = now;
return(file);
}