Check out example codes for "c# web form compare dates". It will help you in understanding the concepts better.

Code Example 1

DateTime date1 = new DateTime(2009, 8, 1, 0, 0, 0);
DateTime date2 = new DateTime(2009, 8, 1, 12, 0, 0);
int result = DateTime.Compare(date1, date2);
string relationship;

if (result < 0)
   relationship = "is earlier than";
else if (result == 0)
   relationship = "is the same time as";         
else
   relationship = "is later than";

Console.WriteLine("{0} {1} {2}", date1, relationship, date2);

// The example displays the following output for en-us culture:
//    8/1/2009 12:00:00 AM is earlier than 8/1/2009 12:00:00 PM

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