iTextSharp.text.pdf.FdfWriter.RemoveField C# (CSharp) Метод

        public bool RemoveField(String field)
        {
            Dictionary<String, Object> map = fields;
            StringTokenizer tk = new StringTokenizer(field, ".");
            if (!tk.HasMoreTokens())
                return false;
            List<object> hist = new List<object>();
            while (true) {
                String s = tk.NextToken();
                Object obj;
                map.TryGetValue(s, out obj);
                if (obj == null)
                    return false;
                hist.Add(map);
                hist.Add(s);
                if (tk.HasMoreTokens()) {
                    if (obj is Dictionary<String, Object>)
                        map = (Dictionary<String, Object>)obj;
                    else
                        return false;
                }
                else {
                    if (obj is Dictionary<String, Object>)
                        return false;
                    else
                        break;
                }
            }
            for (int k = hist.Count - 2; k >= 0; k -= 2) {
                map = (Dictionary<String, Object>)hist[k];
                String s = (String)hist[k + 1];
                map.Remove(s);
                if (map.Count > 0)
                    break;
            }
            return true;
        }