iTextSharp.text.List.Add C# (CSharp) Метод

        public virtual bool Add(Object o) {
            if (o is ListItem) {
                ListItem item = (ListItem) o;
                if (numbered || lettered) {
                    Chunk chunk = new Chunk(preSymbol, symbol.Font);
                    int index = first + list.Count;
                    if (lettered)
                        chunk.Append(RomanAlphabetFactory.GetString(index, lowercase));
                    else
                        chunk.Append(index.ToString());
                    chunk.Append(postSymbol);
                    item.ListSymbol = chunk;
                }
                else {
                    item.ListSymbol = symbol;
                }
                item.SetIndentationLeft(symbolIndent, autoindent);
                item.IndentationRight = 0;
                list.Add(item);
                return true;
            }
            else if (o is List) {
                List nested = (List) o;
                nested.IndentationLeft = nested.IndentationLeft + symbolIndent;
                first--;
                list.Add(nested);
                return true;
            }
            else if (o is string) {
                return this.Add(new ListItem((string) o));
            }
            return false;
        }
    

        /*
         * (non-Javadoc)
         *
         * @see
         * com.itextpdf.tool.xml.ITagProcessor#content(com.itextpdf.tool.xml.Tag,
         * java.util.List, com.itextpdf.text.Document, java.lang.String)
         */
        public override IList<IElement> Content(IWorkerContext ctx, Tag tag, String content) {
            List<Chunk> sanitizedChunks = HTMLUtils.Sanitize(content, false);
		    List<IElement> l = new List<IElement>(1);
            foreach (Chunk sanitized in sanitizedChunks) {
                HtmlPipelineContext myctx;
                try {
                    myctx = GetHtmlPipelineContext(ctx);
                } catch (NoCustomContextException e) {
                    throw new RuntimeWorkerException(e);
                }
                if (tag.CSS.ContainsKey(CSS.Property.TAB_INTERVAL)) {
                    TabbedChunk tabbedChunk = new TabbedChunk(sanitized.Content);
                    if (null != GetLastChild(tag) && GetLastChild(tag).CSS.ContainsKey(CSS.Property.XFA_TAB_COUNT)) {
                        tabbedChunk.TabCount = int.Parse(GetLastChild(tag).CSS[CSS.Property.XFA_TAB_COUNT]);
                    }
                    l.Add(GetCssAppliers().Apply(tabbedChunk, tag,myctx));
                } else if (null != GetLastChild(tag) && GetLastChild(tag).CSS.ContainsKey(CSS.Property.XFA_TAB_COUNT)) {
                    TabbedChunk tabbedChunk = new TabbedChunk(sanitized.Content);
                    tabbedChunk.TabCount = int.Parse(GetLastChild(tag).CSS[CSS.Property.XFA_TAB_COUNT]);
                    l.Add(GetCssAppliers().Apply(tabbedChunk, tag, myctx));
                } else {
                    l.Add(GetCssAppliers().Apply(sanitized, tag, myctx));
                }
            }
            return l;
        }