ADBaseLibrary.Subtitles.TTML.GetAssStyles C# (CSharp) Method

        private Dictionary<string, string> GetAssStyles()
        {
            Dictionary<string, string> ret=new Dictionary<string, string>();
            if (subtitles.Head?.Styling?.Style == null || subtitles.Head.Styling.Style.Count==0)
                return ret;
            foreach (Style s in subtitles.Head.Styling.Style)
            {
                StringBuilder bld = new StringBuilder();
                bld.Append("Style: Style"+s.Id);
                bld.Append(",");
                bld.Append(string.IsNullOrEmpty(s.FontFamily) ? "Trebuchet MS Bold" : s.FontFamily);
                bld.Append(",");
                bld.Append(GetFontSize(s));
                bld.Append(",");
                bld.Append(GetAssColor(s.Color));
                bld.Append(",&H000000FF,");
                int defaultoutline = 2;
                int defaultbold = 0;
                int defaultitalic = 0;
                int defaultunderline = 0;
                int defaultstrikethrough = 0;
                if (string.IsNullOrEmpty(s.TextOutline))
                    bld.Append("&H00020713");
                else
                {
                    string[] nn = s.TextOutline.Split(' ');
                    if (nn.Length > 1)
                    {
                        string k= Regex.Replace(nn[1], @"[^\d]", "");
                        int.TryParse(k, out defaultoutline);
                    }
                    bld.Append(GetAssColor(nn[0], "&H00000000"));
                }
                bld.Append(",");
                bld.Append(GetAssColor(s.BackgroundColor, "&H00000000"));
                bld.Append(",");
                if (s.FontWeight != null)
                {
                    if (s.FontWeight.ToLower().Contains("bold"))
                        defaultbold = -1;
                }
                bld.Append(defaultbold);
                bld.Append(",");
                if (s.FontStyle != null)
                {
                    if (!s.FontStyle.ToLower().Contains("normal") && !s.FontStyle.Contains("inherit"))
                        defaultitalic = -1;
                }
                bld.Append(defaultitalic);
                bld.Append(",");
                if (s.TextDecoration != null)
                {
                    if (s.TextDecoration.ToLower().Contains("underline"))
                        defaultunderline = -1;
                    else if (s.TextDecoration.ToLower().Contains("lineThrough"))
                        defaultstrikethrough = -1;
                }
                bld.Append(defaultunderline);
                bld.Append(",");
                bld.Append(defaultstrikethrough);
                bld.Append(",100,100,0,0,1,");
                bld.Append(defaultoutline);
                bld.Append(",0,");
                int defaultalign = 2;
                if (s.TextAlign != null)
                {
                    switch (s.TextAlign.ToLower())
                    {
                        case "left":
                        case "start":
                            defaultalign = 1;
                            break;
                        case "center":
                            defaultalign = 2;
                            break;
                        case "end":
                        case "right":
                            defaultalign = 3;
                            break;
                    }
                }
                bld.Append(defaultalign);
                bld.Append(",20,20,18,1");
                ret.Add(s.Id, bld.ToString());
            }
            return ret;
        }