How to self-wrap a string in an HTML tag.

DynamicTag.cs

namespace DynamicTag
{
    class Program
    {
        static void Main()
        {
            string s = "blog"
               .Tag("a")
               .Href("http://einarwh.posterous.com")
               .Style("font-weight: bold");
            Console.WriteLine(s);
            Console.ReadLine();
        }
    }

    public class Tag : DynamicObject
    {
        private readonly string _name;
        private readonly string _content;
        private readonly IDictionary<string, string> _props = 
            new Dictionary<string, string>();

        public Tag(string name, string content)
        {
            _name = name;
            _content = content;
        }

        public override bool TryInvokeMember(
            InvokeMemberBinder binder,
            object[] args,
            out object result)
        {            
            _props[binder.Name] = GetValue(args) ?? string.Empty;
            result = this;
            return true;
        }

        private string GetValue(object[] args)
        {
            if (args.Length > 0)
            {
                var arg = args[0] as string;
                if (arg != null)
                {
                    return arg;
                }
            }
            return null;
        }

        public override string ToString()
        {
            var sb = new StringBuilder();
 
            sb.Append("<").Append(_name);

            foreach (var p in _props)
            {
                sb.Append(" ")
                  .Append(p.Key.ToLower())
                  .Append("=\"")
                  .Append(p.Value)
                  .Append("\"");
            }

            sb.Append(">")
              .Append(_content)
              .Append("</")
              .Append(_name)
              .Append(">");

            return sb.ToString();
        }

        public static implicit operator string(Tag tag)
        {
            return tag.ToString();
        }
    }

    public static class StringExtensions
    {
        public static dynamic Tag(this string content, string name)
        {
            return new Tag(name, content);
        }
    }
}