C# 時間函數 DateTime.Compare(datetime1, datetime2)用法

using System;
class Program
{
    static void Main()
    {
        DateTime date1 = new DateTime(2009, 8, 1, 0, 0, 0); // 8月1日午夜
        DateTime date2 = new DateTime(2009, 8, 1, 12, 0, 0); // 同一天的中午
        int result = DateTime.Compare(date1, date2);
        string relationship;
        if (result < 0)
            relationship = "is earlier than";  //date1 < date2
        else if (result == 0)
            relationship = "is the same time as";  //date1 == date2
        else
            relationship = "is later than";  //date1 > date2
        Console.WriteLine("{0} {1} {2}", date1, relationship, date2);
    }
}