C# 연습

DateOnly Appointment Scheduler

DateOnly represents calendar dates without accidental time-zone concerns.

How it works

Calculate dates with DateOnly and DayOfWeek.

AddDays returns a new value because date types are immutable.

Runnable C# example

Program.cs

using System;
class Program
{
    static void Main()
    {
        var start = new DateOnly(2026, 8, 24);
        var followUp = start.AddDays(14);
        Console.WriteLine($"{followUp:yyyy-MM-dd} ({followUp.DayOfWeek})");
    }
}

Expected output

2026-09-07 (Monday)

Practice with the debugger

Set a breakpoint on an important assignment or condition, click Debug, and inspect the local values before stepping to the next line.