using System;
class DateAdditionExample
{
/// <summary>
/// Adds a specified number of weeks to a given DateTime.
/// </summary>
/// <param name="baseDate">The original DateTime value.</param>
/// <param name="weeks">The number of weeks to add (can also be negative to subtract).</param>
/// <returns>A new DateTime with the added weeks.</returns>
public static DateTime AddWeeksToDate(DateTime baseDate, int weeks)
{
// DateTime does not have a direct AddWeeks method,
// so we multiply weeks by 7 and use AddDays.
return baseDate.AddDays(weeks * 7);
}
static void Main()
{
// Initialize a sample date: November 8, 2026
DateTime targetDate = new DateTime(2026, 11, 8);
int weeksToAdd = 4;
// Perform the addition
DateTime resultDate = AddWeeksToDate(targetDate, weeksToAdd);
// Display the formatted results using interpolated strings
Console.WriteLine($"Original date: {targetDate:yyyy-MM-dd}");
Console.WriteLine($"After adding {weeksToAdd} weeks: {resultDate:yyyy-MM-dd}");
}
}
/*
run:
Original date: 2026-11-08
After adding 4 weeks: 2026-12-06
*/
