using System;

​

public class Program

{

    public static void Main()

    {

        var withMethodObj = new WithMethod();

        withMethodObj.DoYourThing("Derek");

        var withLambdaObj = new WithLambda();

        withLambdaObj.DoYourThing("Ian");

    }

​

    /* Pretend this is how the code originally is. The signature of 'AMethod' matches that of the 'MyEvent' delegate */

    public class WithMethod

    {

        private string _name;

        public void DoYourThing(string name)

        {

            this._name = name;

            var eventObj = new EventClass();

            eventObj._theEvent += AMethod;

            eventObj.Fire();

        }

​

        public void AMethod(object sender)

        {

            Console.WriteLine("Hello, {0}", _name);

        }

    }

​

    /* This is how the code could be. The signature of the lambda method matches that of the 'MyEvent' delegate, 

       but we can reference the variables within the scope of the 'DoYourThing' method*/

    public class WithLambda

    {

        public void DoYourThing(string name)

        {

            var eventObj = new EventClass();

            eventObj._theEvent += (object sender) =>

            {

                Console.WriteLine("Hello, {0}", name);

            };

            eventObj.Fire();

        }

    }

​

    /* Pretend this is the xmlSettings class. It invokes the assigned event when you call Fire() */

    public delegate void MyEvent(object sender);

    public class EventClass

    {

        public event MyEvent _theEvent;

        public void Fire()

        {

            if (_theEvent != null)

            {

                _theEvent(this);

            }

        }

    }

}