Custom event args on a dynamically assigned event handler

I am assigning a click event handler like so

var buttonEvent = button.GetType().GetEvent("Click");
var eventMethod = GetType().GetMethod("button_Click");

var handler = Delegate.CreateDelegate(buttonEvent.EventHandlerType, this, eventMethod);

buttonEvent.AddEventHandler(button, handler);

The click event handler is like so:

void button_Click(object sender, EventArgs e) { }

How can I pass custom args into the handler? Ideally I would love

void button_Click(object sender, MyCustomEventArgs e) { }

where I can set MyCustomEventArgs when I assign the event.