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C#-Quelltext

    public class Entity
    {

        private int id;
        private EntityManager mgr;

        public Entity(EntityManager mgr, int id)
        {
            this.mgr = mgr;
            this.id = id;
        }

        public void addComponent(IComponent component)
        {
            mgr.addComponent(this, component);
        }

       // Das ist noch nicht alles, aber ist für einen komfortablen Testlauf genügend

        public int ID
        {
            get
            {
                return this.id;
            }
        }

    }

C#-Quelltext

    public interface IComponent
    {

        uint SysID
        {
            get;
        }

    }

C#-Quelltext

    public interface ISystem
    {

        uint SysID
        {
            get;
        }

        void processComponent(IComponent component);

    }

C#-Quelltext

    public class EntityManager
    {

        private Dictionary<int, List<IComponent>>       entitys;
        private List<int>                               openSet;
        private SystemManager                           systemManager;

        public EntityManager(SystemManager systemManager)
        {
            entitys = new Dictionary<int, List<IComponent>>();
            openSet = new List<int>();

            this.systemManager = systemManager;
        }

        public Entity createEntity()
        {
            if(0 == openSet.Count)
            {
                var entity = new Entity(this, entitys.Count);
                entitys[entity.ID] = new List<IComponent>();
                return entity;
            }
            else
            {
                var entity = new Entity(this, openSet[0]);
                entitys[entity.ID] = new List<IComponent>();
                return entity;
            }
        }

        public void destroyEntity(Entity entity)
        {
            entitys.Remove(entity.ID);
            openSet.Add(entity.ID);
        }

        public void addComponent(Entity entity, IComponent component)
        {
            IComponent[] components = entitys[entity.ID].ToArray();

            foreach(IComponent c in components)
            {
                if (c.SysID == component.SysID)
                    // Add some kind of notification
                    // Exception; Debug; PopUpwindow?
                    return;
            }

            entitys[entity.ID].Add(component);
        }

        public void removeComponent(Entity entity, IComponent component)
        {
            entitys[entity.ID].Remove(component);
        }

        public void processEntitys()
        {
            foreach(KeyValuePair<int, List<IComponent>> entry in entitys)
            {
                systemManager.processComponents(entry.Value);
            }
        }

    }

C#-Quelltext

    public class SystemManager
    {

        public Dictionary<uint, ISystem> systems;

        public SystemManager()
        {
            systems = new Dictionary<uint, ISystem>();
        }

        public void addSystem(ISystem system)
        {
            systems[system.SysID] = system;
        }

        public void processComponents(List<IComponent> components)
        {
                foreach(IComponent c in components)
                {
                    var sys = systems[c.SysID];
                    if (null != sys)    // Corresponding system exists, else skip this component :P
                        sys.processComponent(c);
                }
        }
    }