public static void AddNew(string url, Bitmap bmp)
{
Uri uri = new Uri(url);
string key = uri.Scheme + "://" + uri.Host;
Dictionary <string, Bitmap> favicons = FileOptions.LoadFavicons();
if (!favicons.ContainsKey(key))
{
favicons.Add(key, bmp);
}
FileOptions.SaveFavicons(favicons);
}