public void ThoiGianHienHanh()
Console.WriteLine("Thoi gian hien hanh la : {0}/{1}/{2} {3}:{4}:{5}", Ngay, Thang, Nam, Gio, Phut, Giay);
public ThoiGian( System.DateTime dt )
System.DateTime currentTime = System.DateTime.Now;
ThoiGian t = new ThoiGian( currentTime );