asp.net 时间比较，常用于在某段时间进行操作

    using System;  
    using System.Collections.Generic;  
    using System.Linq;  
    using System.Text;  
      
    namespace ConsoleApplication1  
    {  
        class Program  
        {  
            static void Main(string[] args)  
            {  
      
                DateTime t1 = DateTime.Parse("2011-2-2");  
                DateTime t2 = DateTime.Parse("2011-3-1");  
      
                if (DateTime.Compare(t1, t2) > 0)   
                    Console.WriteLine("t1 > t2");  
                if (DateTime.Compare(t1, t2) == 0)   
                    Console.WriteLine("t1 == t2");  
                if (DateTime.Compare(t1, t2) < 0)   
                    Console.WriteLine("t1 < t2");  
            }  
        }  
    }