DynamicObject

Program.cs

using System;
using System.Dynamic;

namespace ConsoleApplication1
{
    class Dynamic : DynamicObject
    {
        public override bool TryGetMember(GetMemberBinder binder, out object result)
        {
            if (binder.Name == "Name")
            {
                result = "Svick";
                return true;
            }

            return base.TryGetMember(binder, out result);
        }
    }
    
    class Program
    {
        static void Main()
        {
            dynamic dynamic = new Dynamic();

            Console.WriteLine(dynamic.Name); // writes "Svick"

            var dict = new System.Web.Routing.RouteValueDictionary(dynamic);

            Console.WriteLine(dict.Count); // writes "0"
        }
    }
}