public T Add <T>() where T : Component
{
ComponentHelper.Assert <T>();
/*if (!ComponentHelper.AllowMultiple<T>() && Handle.Has<T>()) {
* throw new Exception($"Already has a component of type {typeof(T).Name}");
* }
* T component = Activator.CreateInstance<T>();
* component.AppendTo(this);
* Events.RaiseAddedComponent(component);
* var registerAs = ComponentHelper.GetRegisterAs<T>();
* if (registerAs != null) {
* registerAs.CallSet(Handle, component);
* } else {
* Handle.Set(component);
* }
* return component;*/
T component = Activator.CreateInstance <T>();
ComponentHelper.CallSet(Handle, component);
component.AppendTo(this);
Events.RaiseAddedComponent(component);
return(component);
}