public Astronaut GetOldestAstronaut() { Astronaut oldest = this.data.OrderByDescending(x => x.Age).FirstOrDefault(); return(oldest); }
public Astronaut GetAstronaut(string name) { Astronaut ast = this.data.FirstOrDefault(x => x.Name == name); return(ast); }
public void Add(Astronaut astronaut) { this.data.Add(astronaut); }