Entitymanager

using Microsoft.Xna.Framework;
using Microsoft.Xna.Framework.Graphics;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace GameBase
{
    class EntityMgr
    {
        public void AddEntity(Entity entityToAdd)
        {

            Entity stepEntity = firstentity;
            if (firstentity != null)
            {
                while (stepEntity.nextEntity != null)
                {
                    stepEntity = stepEntity.nextEntity; // stepentity blir nästa entity
                    {

                    }
                    stepEntity.nextEntity = entityToAdd;
                    {
                        firstentity = entityToAdd; //lägger till en ny entity.
                    }
                }
            }
        }

        private Entity firstentity;
        public EntityMgr()
        {
            firstentity = null;
        }
        public void Update(GameTime gameTime)
        {

            Entity stepEntity = this.firstentity;
            if (firstentity!= null)
            {
                while(stepEntity!=null)
                {
                    stepEntity.Update(gameTime);
                    stepEntity = stepEntity.nextEntity;

                }
            }

        }
        public void Draw(SpriteBatch spriteBatch)
        {
            Entity stepentity = this.firstentity;

            if (firstentity != null)

            {
                while (stepentity != null)
                {
                    stepentity.Draw(spriteBatch);
                    stepentity = stepentity.nextEntity;

                }
            }
        }
    }
}