using System;

namespace ConsoleApplication1 {
	class Enums {
		public enum TPStep { Larry, Moe, Curley }
	}

	class StepChangeArgs : EventArgs {
		protected Enums.TPStep currentStep;
		public StepChangeArgs(Enums.TPStep currentStep) {
			this.currentStep = currentStep;
		}
		public Enums.TPStep CurrentStep { get { return this.currentStep; } }
	}


	class EBase {
		public delegate void StepChangeHandler(object sender, StepChangeArgs e);
		public event StepChangeHandler OnStepChanged;

		protected Enums.TPStep currentStep = Enums.TPStep.Larry;

		public virtual Enums.TPStep CurrentStep {
			get { return this.currentStep; }
			set {
				this.currentStep = value;
				if (this.OnStepChanged!=null) {
					OnStepChanged(this, new StepChangeArgs(value)); 
				}
			}
		}
	}

	class EBaseFoo : EBase {
	}

	class Program {
		static void Main(string[] args) {
			EBaseFoo foo = new EBaseFoo();
			foo.OnStepChanged+=new EBase.StepChangeHandler(foo_OnStepChanged);
			foo.CurrentStep = Enums.TPStep.Curley;
			foo.CurrentStep = Enums.TPStep.Moe;
			Console.WriteLine("Done");
			Console.ReadLine();
		}

		static void  foo_OnStepChanged(object sender, StepChangeArgs e) {
			Console.WriteLine("OnStepChanged: " + e.CurrentStep);
		}
	}
}