Abstract Singleton Cache Factory, C# flavor

gistfile1.cs

/* 5.11.2012 22:08 */
using System;
using System.Collections.Generic;

namespace ServiceManager
{
	public static class ServiceManager
	{
		private static Dictionary<Type, ServiceBase> _cache = new Dictionary<Type, ServiceBase>();
		
		public static ServiceType Get<ServiceType>(string context) where ServiceType: ServiceBase, new() {
			var t = typeof(ServiceType);
			ServiceBase inst;
			if(!_cache.TryGetValue(t, out inst)) {
				_cache[t] = inst = new ServiceType();
			}
			inst.SetContext(context);
			return (ServiceType)inst;
		}
	}

	public abstract class ServiceBase
	{
		public abstract void SetContext(string context);
		
		public ServiceBase() {
			Console.WriteLine("FYI: New " + GetType().Name + " was born.");
		}
	}
	
	public class AwesomeService: ServiceBase
	{
		private string _context = "none";
		
		public override void SetContext(string context) {
			_context = context;
		}
		
		public void ShoutThineContext() {
			Console.WriteLine("LET IT BE KNOWN THAT " + _context.ToUpper() + " IS THE CONTEXT!");
		}
	}	
	
	class Program
	{
		public static void Main(string[] args)
		{
			var awsm1 = ServiceManager.Get<AwesomeService>("awesome");
			awsm1.ShoutThineContext();
			var awsm2 = ServiceManager.Get<AwesomeService>("super awesome");
			awsm2.ShoutThineContext();
			
			Console.WriteLine(awsm1.Equals(awsm2));
			Console.ReadKey(true);
		}
	}
}