Entitas.Context.GetEntities C# (CSharp) Method

        public virtual Entity[] GetEntities()
        {
            if(_entitiesCache == null) {
                _entitiesCache = new Entity[_entities.Count];
                _entities.CopyTo(_entitiesCache);
            }

            return _entitiesCache;
        }

 static void moveSystem(Context context) {
     var entities = context.GetEntities(Matcher.AllOf(Matcher.Move, Matcher.Position));
     foreach(var entity in entities) {
         var move = entity.move;
         var pos = entity.position;
         entity.ReplacePosition(pos.x, pos.y + move.speed);
     }
 }