using System;
using System.Collections;

namespace Indexers
{
	class Class1
	{
		[STAThread]
		static void Main(string[] args)
		{
			A a = new A();
			a.Prop1["s"] = 456;
			a.Prop2["s"] = 120;
			Console.WriteLine(a.Prop1["s"]);
			Console.WriteLine(a.Prop2["s"]);
			Console.ReadLine();
		}

		public class A
		{
			private B _prop1 = new B();
			private B _prop2 = new B();

			public B Prop1
			{
				get { return _prop1; }
			}

			public B Prop2
			{
				get { return _prop2; }
			}

			public class B : DictionaryBase
			{
				public object this[object key]
				{
					get { return Dictionary[key]; }
					set { Dictionary[key] = value; }
				}
			}
		}
	}
}