coding-style

This is good stuff. Make them extension methods though to clean up your code a little more. For example: //Replaces OnMyEventRaised boiler-plate code //Usage: SafeInvoker.RaiseEvent(this, MyEventRaised) public static void Raise(this EventHandler eventToRaise, object sender) { EventHandler eventHandler = eventToRaise; if (eventHandler != null) eventHandler(sender, EventArgs.Empty); } Now on your events you can call: myEvent.Raise(this);

Use a Dictionary. Something like this: Dictionary<int, ServiceClass> dictionary = new Dictionary<int, ServiceClass>() { {1, new ServiceClass()}, {2, new ServiceClass()}, {3, new BTWithdrawal()},//assume BTWithdrawal inherits from ServiceClass }; An example of how using it: ServiceClass value=new ServiceClass(); value.FromServiceId=1; value.ToServiceId = 2; dictionary.TryGetValue(value.FromServiceId, out value); //or dictionary.TryGetValue(value.ToServiceId, out value); if (value != null) MessageBox.Show(value.Id.ToString());