iTextSharp.text.Chunk.Append C# (CSharp) Метод

        public StringBuilder Append(string str)
        {
            return content.Append(str);
        }

 /**
 * Adds an <CODE>Object</CODE> to the <CODE>List</CODE>.
 *
 * @param    o    the object to add.
 * @return true if adding the object succeeded
 */
 public override bool Add(Object o) {
     if (o is ListItem) {
         ListItem item = (ListItem) o;
         Chunk chunk = new Chunk(preSymbol, symbol.Font);
         switch (type ) {
             case 0:
                 chunk.Append(((char)(first + list.Count + 171)).ToString());
                 break;
             case 1:
                 chunk.Append(((char)(first + list.Count + 181)).ToString());
                 break;
             case 2:
                 chunk.Append(((char)(first + list.Count + 191)).ToString());
                 break;
             default:
                 chunk.Append(((char)(first + list.Count + 201)).ToString());
                 break;
         }
         chunk.Append(postSymbol);
         item.ListSymbol = chunk;
         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;
 }