动态事件绑定

Question

            EventInfo evt = this.button1.GetType().GetEvent("Click", BindingFlags.NonPublic | BindingFlags.Instance | BindingFlags.Public);
            Assembly sys = Assembly.LoadFile(Application.StartupPath + "\\ClassLibrary1.dll");
            Type t = sys.GetType("ClassLibrary1.Class1");
            timer = Activator.CreateInstance(t);            MethodInfo info = t.GetMethod("button1_Click");
            Delegate d = Delegate.CreateDelegate(evt.EventHandlerType, info);//报：绑定到目标方法时出错。            evt.AddEventHandler(this.button1, d);这是什么原因，请指点谢谢

Answer 1

Delegate d = Delegate.CreateDelegate(evt.EventHandlerType, timer, info);//