simple IoC container.cs

   class Container
    {
        private Dictionary<Type, Object> map;

        public Container()
        {
            map = new Dictionary<Type, Object>();
        }

        public void Bind<T>(Func<Container, T> lambda)
        {
            map.Add(typeof(T), lambda);
        }

        public T Make<T>()
        {
            var type = typeof(T);

            if (!map.ContainsKey(type))
            {
                throw new NotRegisteredException();
            }

            return (T) ((Func<Container, T>) map[type])(this);
        }

        public class NotRegisteredException : Exception { }
    }