public void AddRemoveHandlerTest()
{
var manager = new WeakEventManager <EventArgs>();
var validated = false;
EventHandler <EventArgs> handler = (s, e) =>
{
Assert.Equal(s, this);
validated = true;
};
manager.Add(handler);
manager.Invoke(this, new EventArgs());
Assert.True(validated);
validated = false;
manager.Remove(handler);
manager.Invoke(this, new EventArgs());
Assert.False(validated);
}