从文件名中获取日期部分，并使用c#根据最新日期进行排序

using System;
using System.IO;
using System.Linq;

class Program
{
    static void Main()
    {
        string directoryPath = "指定目录路径";
        string[] fileNames = Directory.GetFiles(directoryPath);

        var fileNameDateMap = new Dictionary<string, DateTime>();

        foreach (string fileName in fileNames)
        {
            string datePart = fileName.Substring(0, 8); // 假设日期部分位于文件名的前8个字符
            DateTime date = DateTime.ParseExact(datePart, "yyyyMMdd", CultureInfo.InvariantCulture);
            fileNameDateMap.Add(fileName, date);
        }

        var sortedFileNames = fileNameDateMap.OrderByDescending(x => x.Value).Select(x => x.Key);

        foreach (string fileName in sortedFileNames)
        {
            Console.WriteLine(fileName);
        }
    }
}