C# CompareTo 判斷時間是否過期

 
      // Earlier = -1,
      // Later = 1,
      // TheSame = 0

     DateTime EXPIRE_END_DATE = DateTime.Parse("2019-10-14 01:00:00");
     if (EXPIRE_END_DATE.CompareTo(DateTime.Now) < 0 )
     {
             // "已過期！！" 
             
     }else if (EXPIRE_END_DATE.CompareTo(DateTime.Now) == 0 )
     {
             // "日期時間一樣" 
             
     }else if (EXPIRE_END_DATE.CompareTo(DateTime.Now) > 0 )
     {
             // "未過期！！" 
             
     }