C#根据特定天数将日期范围按部分进行分组

using System;
using System.Collections.Generic;

public class Program
{
    public static void Main()
    {
        DateTime startDate = new DateTime(2022, 1, 1);
        DateTime endDate = new DateTime(2022, 1, 31);
        int groupSize = 7; // 指定的天数

        List<Tuple<DateTime, DateTime>> dateGroups = GroupDates(startDate, endDate, groupSize);

        foreach (var group in dateGroups)
        {
            Console.WriteLine($"Group: {group.Item1.ToShortDateString()} - {group.Item2.ToShortDateString()}");
        }
    }

    public static List<Tuple<DateTime, DateTime>> GroupDates(DateTime startDate, DateTime endDate, int groupSize)
    {
        List<Tuple<DateTime, DateTime>> dateGroups = new List<Tuple<DateTime, DateTime>>();

        int totalDays = (int)(endDate - startDate).TotalDays;
        int groupCount = totalDays / groupSize;

        for (int i = 0; i < groupCount; i++)
        {
            DateTime groupStartDate = startDate.AddDays(i * groupSize);
            DateTime groupEndDate = groupStartDate.AddDays(groupSize - 1);
            dateGroups.Add(new Tuple<DateTime, DateTime>(groupStartDate, groupEndDate));
        }

        // 处理剩余的天数
        int remainingDays = totalDays % groupSize;
        if (remainingDays > 0)
        {
            DateTime lastGroupStartDate = startDate.AddDays(groupCount * groupSize);
            DateTime lastGroupEndDate = lastGroupStartDate.AddDays(remainingDays - 1);
            dateGroups.Add(new Tuple<DateTime, DateTime>(lastGroupStartDate, lastGroupEndDate));
        }

        return dateGroups;
    }
}