DateTime

Added static Instance method allow the creation of a particular date.

 static DateTime Instance(int year, int month, int day, optional int hour, optional int minute, optional int second, optional int millisecond)

E.g.

 @@DateTime.Instance(2005, 1, 9)@@

Added static DaysInMonth method to return the number of days for the specified month in the specified year.

 static int DaysInMonth(int year, int month)

E.g.

 @@DateTime.DaysInMonth(2005, 1)@@

TimeSpan

Added static Instance method allow the creation of a particular timespan.

 static TimeSpan Instance(optional int days, optional int hours, optional int minutes, optional int seconds, optional int milliseconds)

E.g.

 @@TimeSpan.Instance(7)@@