using System;

    using System.Collections.Generic;

    using System.Linq;

    using System.Reflection;

​

​

    public enum ActionCode

    {

        Login,

        Logout

    }

    public class ActionAttribute : Attribute

    {

        public ActionCode ActionCode { get; private set; }

        public ActionAttribute(ActionCode code)

        {

            ActionCode = code;

        }

    }

    public class Action

    {

        public Action(byte[] data)

        {

        }

        protected string ReadMapleString()

        {

            return null;

        }

    }

​

    [Action(ActionCode.Login)]

    public class LoginAction : Action

    {

        public string Username { get; private set; }

        public string Password { get; private set; }

        public LoginAction(byte[] data)

            : base(data)

        {

            this.Username = this.ReadMapleString();

            this.Password = this.ReadMapleString();

        }

        static public void Login(LoginAction action)

        {

            Console.WriteLine("LoginAction.Login(LoginAction) called");

        }

    }

​

​

​

    public class Program

    {

        static public void Main()

        {

            var actionCode = ActionCode.Login;

            var data = new byte[]{};

            OnReceiveData(actionCode, data);

            Console.WriteLine("Complete.");

        }

        static public void OnReceiveData(ActionCode code, byte[] data)

        {

            var type = System.Reflection.Assembly.GetCallingAssembly()

                .GetTypes()

                .Where

                (

                    t => t.GetCustomAttributes()

                          .OfType<ActionAttribute>()

                          .Where( a => a.ActionCode == code)

                          .Any()

                )

                .Single();

            var member = type

                .GetMethods(BindingFlags.Static | BindingFlags.Public)

                .Where

                ( 

                    m=> m.GetParameters()

                         .First()

                         .ParameterType == type

                )

                .Single();

            var instance = Activator.CreateInstance(type, new object[] { data });

            member.Invoke(null, new object[] { instance });

        } 

        static IEnumerable<Type> GetTypesWithActionAttribute(Assembly assembly)

        {

            foreach(Type type in assembly.GetTypes())

            {

                if (type.GetCustomAttributes(typeof(ActionAttribute), true).Length > 0)

                {

                    yield return type;

                }

            }

        }

    }

​