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);
}