riversong-code-showcase/Source/Riversong/Game/CommonServices/Entities/EntityCollectionCallbacks.cs

using System;

namespace DanieleMarotta.RiversongCodeShowcase
{
    public class EntityCollectionCallbacks<T> : IEntityCollectionCallbacks<T> where T : Entity
    {
        public event Action<T> Added;

        public event Action<T> Removed;

        public void OnAdded(Entity entity)
        {
            Added?.Invoke((T)entity);
        }

        public void OnRemoved(Entity entity)
        {
            Removed?.Invoke((T)entity);
        }
    }
}