using System;

using System.Linq.Expressions;

using System.Reflection;

​

namespace eventtest

{

    class Program

    {

        static event EventHandler E;

​

        static void Handle(Expression<Func<Delegate>> eventExpression, EventHandler handler)

        {

            // get the event

            var memberExpression = eventExpression.Body as MemberExpression;

            var eventField = memberExpression.Member as FieldInfo;

​

            // subscribe

            var eventHandlerList = eventField.GetValue(null) as Delegate;

            eventField.SetValue(null, Delegate.Combine(eventHandlerList, handler));

        }

​

        static void Main(string[] args)

        {

            var other = new OtherClass();

            Handle(() => other.E, (s, e) => Console.WriteLine("Event received"));

            E(null, EventArgs.Empty);

        }

    }

    public class OtherClass

    {

        public event EventHandler E;    

    }

}

​