OpenTween.Twitter.CreateHtmlAnchor C# (CSharp) Method

        public string CreateHtmlAnchor(string text, List<string> AtList, TwitterEntities entities, List<MediaInfo> media)
        {
            if (entities != null)
            {
                if (entities.Hashtags != null)
                {
                    lock (this.LockObj)
                    {
                        this._hashList.AddRange(entities.Hashtags.Select(x => "#" + x.Text));
                    }
                }
                if (entities.UserMentions != null)
                {
                    foreach (var ent in entities.UserMentions)
                    {
                        var screenName = ent.ScreenName.ToLowerInvariant();
                        if (!AtList.Contains(screenName))
                            AtList.Add(screenName);
                    }
                }
                if (entities.Media != null)
                {
                    if (media != null)
                    {
                        foreach (var ent in entities.Media)
                        {
                            if (!media.Any(x => x.Url == ent.MediaUrl))
                            {
                                if (ent.VideoInfo != null &&
                                    ent.Type == "animated_gif" || ent.Type == "video")
                                {
                                    //var videoUrl = ent.VideoInfo.Variants
                                    //    .Where(v => v.ContentType == "video/mp4")
                                    //    .OrderByDescending(v => v.Bitrate)
                                    //    .Select(v => v.Url).FirstOrDefault();
                                    media.Add(new MediaInfo(ent.MediaUrl, ent.AltText, ent.ExpandedUrl));
                                }
                                else
                                    media.Add(new MediaInfo(ent.MediaUrl, ent.AltText, videoUrl: null));
                            }
                        }
                    }
                }
            }

            // PostClass.ExpandedUrlInfo を使用して非同期に URL 展開を行うためここでは expanded_url を使用しない
            text = TweetFormatter.AutoLinkHtml(text, entities, keepTco: true);

            text = Regex.Replace(text, "(^|[^a-zA-Z0-9_/&#＃@＠>=.~])(sm|nm)([0-9]{1,10})", "$1<a href=\"http://www.nicovideo.jp/watch/$2$3\">$2$3</a>");
            text = PreProcessUrl(text); //IDN置換

            return text;
        }