ExpandoObject-esque DynamicObject ToString overriding

Program.cs

using System;
using System.Linq;
using System.Dynamic;
using System.Collections.Generic;

namespace Expando
{
    public delegate string ToStringFunc();

    class ToStringExpandoObject : DynamicObject
    {
        public IDictionary<string, object> Members { get; private set; }

        public ToStringExpandoObject()
        {
            this.Members = new Dictionary<string, object>();
        }

        public override bool TryDeleteMember(DeleteMemberBinder binder)
        {
            return this.Members.Remove(binder.Name);
        }

        public override bool TryGetMember(GetMemberBinder binder, out object result)
        {
            return this.Members.TryGetValue(binder.Name, out result);
        }

        public override bool TrySetMember(SetMemberBinder binder, object value)
        {
            this.Members[binder.Name] = value;
            return true;
        }

        public override string ToString()
        {
            //see if we defined a ToString member
            //if not, use the base implementation
            object methodObj;
            this.Members.TryGetValue("ToString", out methodObj);
            ToStringFunc method = methodObj as ToStringFunc;
            if (method == null)
                return base.ToString();

            return method();
        }
    }

    class MainClass
    {
        

        public static void Main(string[] args)
        {
            dynamic test = new ToStringExpandoObject();

            test.ToString = new ToStringFunc(() =>
                {
                    return "Test";
                });

            test.Asdf = "asdf";

            Console.WriteLine(test);
            Console.WriteLine(test.ToString());
            Console.WriteLine(test.Asdf);

            test = new ToStringExpandoObject();
            Console.WriteLine(test);
            Console.WriteLine(test.ToString());
        }
    }
}

A big thank you for that :-) I used it in my open source XmlSlurper (https://github.com/dandraka/XmlUtilities/) and it was a life saver :-)