日志处理：日期做名称的文件夹和日志文件

using System;
using System.IO;

namespace DeleteLastWeek
{
    public class Program
    {
        //获取执行程序目录
        static string sPath = System.Reflection.Assembly.GetCallingAssembly().GetName().CodeBase;
        static void Main(string[] args)
        {
            //获取根目录
            string path = Path.GetDirectoryName(sPath).Substring(sPath.IndexOf("///", StringComparison.Ordinal) + 1);
            //定位日志目录
            string logpath = path + @"\TextLog\";

            //判断是否存在日志目录
            if (Directory.Exists(logpath))
            {
                //获取日志目录下的所有文件夹
                DirectoryInfo dinfor = new DirectoryInfo(logpath);
                DirectoryInfo[] files = dinfor.GetDirectories();

                //遍历所有文件夹
                foreach (DirectoryInfo directory in files)
                {
                    //判断文件夹日期是否为这个月
                    var res = String.CompareOrdinal(directory.Name, DateTime.Now.ToString("yyyyMM"));
                    if (res < 0)
                    {
                        FileInfo[] filesInfo = directory.GetFiles();
                        foreach (FileInfo info in filesInfo)
                        {
                            info.Delete();
                        }
                        directory.Delete();
                    }

                    if (res == 0)
                    {
                        FileInfo[] filesInfo = directory.GetFiles();
                        foreach (FileInfo info in filesInfo)
                        {
                            var result = String.CompareOrdinal(info.Name.Substring(0,8), DateTime.Now.AddDays(-7).ToString("yyyyMMdd"));
                            if (result > 0)
                            {
                            }
                            else
                            {
                                info.Delete();
                            }
                        }
                    }
                }
            }
        }
    }
}