Entitas.Group.GetEntities C# (CSharp) Method

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

            return _entitiesCache;
        }

 public GroupSingleEntityException(Group group) :
     base("Cannot get the single entity from " + group + "!\nGroup contains " + group.count + " entities:",
          string.Join("\n", group.GetEntities().Select(e => e.ToString()).ToArray()))
 {
 }