GregorianCalendar.AddMonths
using System; using System.Globalization; public class SamplesGregorianCalendar { public static void Main() { DateTime myDT = new DateTime( 2010, 4, 3, new GregorianCalendar() ); GregorianCalendar myCal = new GregorianCalendar(); DisplayValues( myCal, myDT ); myDT = myCal.AddYears( myDT, 2 ); myDT = myCal.AddMonths( myDT, 10 ); DisplayValues( myCal, myDT ); } public static void DisplayValues( Calendar myCal, DateTime myDT ) { Console.WriteLine( " Era: {0}", myCal.GetEra( myDT ) ); Console.WriteLine( " Year: {0}", myCal.GetYear( myDT ) ); Console.WriteLine( " Month: {0}", myCal.GetMonth( myDT ) ); Console.WriteLine( " DayOfYear: {0}", myCal.GetDayOfYear( myDT ) ); Console.WriteLine( " DayOfMonth: {0}", myCal.GetDayOfMonth( myDT ) ); Console.WriteLine( " DayOfWeek: {0}", myCal.GetDayOfWeek( myDT ) ); Console.WriteLine(); } }