private static void CopyAndModify()
{
Person person1 = new Person
{
FirstName = "Teo",
LastName = "Nguyen",
DayOfBirth = new DateTime(1989, 1, 1)
};
Person person2 = person1;
Console.WriteLine("Person1 berefore Updating:");
person1.Print();
Console.WriteLine("Person2 berefore Updating:");
person2.Print();
person1.FirstName = "Teo ABC";
person2.FirstName = "Ti XYZ";
Console.WriteLine("Person1 after Updated:");
person1.Print();
Console.WriteLine("Person2 after Updated:");
person2.Print();
}
