/// <summary>
/// Mark a RssItem as read.
/// </summary>
/// <param name="rssItem">The RssItem</param>
public void MarkRssItemAsRead(RssItem rssItem)
{
_lstCacheRssItems.Add(rssItem.Guid);
_fileController.AppendTextToFile(PathGuidCache, rssItem.Guid);
}