public void Show()
{
//var (first, last) = GetFirstAndLastname();
//var firstName = GetFirstAndLastname();
var firstAndLastName = new FirstAndLastName("Jenny", "?");
var (firstName, lastName) = firstAndLastName; //automatically calls method Deconstruct.
}
public void ShowAssignByOut ()
{
string first;
string last;
var firstAndLastName = new FirstAndLastName("Jenny", "?");
firstAndLastName.AssignByOut(out first, out last);
}