static void Main(string[] args)
{
Person teacher, student;
teacher = new Person("Dan", 42);
student = new Person("Bobby", 21);
string message = teacher.SayHello(student);
Console.WriteLine(message);
message = student.SayHello(teacher.Name);
Console.WriteLine(message);
}
public string SayHello(Person that)
{
return SayHello(that.Name);
}
