public static string Convert(Dictionary <string, string> dic, IFormatStrategy format)
        {
            StringBuilder t = new();

            format.Init(t);

            foreach (var item in dic)
            {
                format.AddElement(t, item.Key, item.Value);
            }

            format.Close(t);
            return(t.ToString());
        }
 public Document Append(string title, string value)
 {
     formatStrategy.AddElement(sb, title, value);
     return(this);
 }