C#中Time
DateTime Structure
http://msdn.microsoft.com/en-us/library/system.datetime.aspx
TimeSpan Structure
http://msdn.microsoft.com/en-us/library/system.timespan.aspx
DateTime Structure
http://msdn.microsoft.com/en-us/library/system.datetime.aspx
TimeSpan Structure
http://msdn.microsoft.com/en-us/library/system.timespan.aspx