Retrieve most up-to-date DateTime

How do I write a code that can retrieve the most up-to-date date and time?

DateTime.Now only retrieve the system date time, what if the system date and time is set wrongly?

Thanks!
[211 byte] By [tsc] at [2008-1-10]
# 1
You could read up the "Network Time Protocol" specification and talk with an NTP server to get the actual time... (Btw, in most situations you don't really need the actual time, just a mechanism to synchronize between two or more machines...)
timvw at 2007-10-3 > top of Msdn Tech,Visual C#,Visual C# General...