private void AddEnvironmentEntities(List <Team> teams) { Requires.NotNull(teams, nameof(teams)); List <Entity> Walls = new List <Entity>(); this.EntityManager.Add(Statics.CreateTopWall()); this.EntityManager.Add(Statics.CreateBottomWall()); this.EntityManager.Add(Statics.CreateLeftWall()); this.EntityManager.Add(Statics.CreateRightWall()); foreach (Entity entity in GetCharactersFromMembers(teams)) { this.EntityManager.Add(entity); } }