对目录操作例子:

using System;using System.Collections.Generic;using System.Linq;using System.Text;using System.Threading.Tasks;using System.IO;namespace DirectoryandDirectoryInfo{    class Program    {        static void Main(string[] args)        {            string dirPath = "d:\\dir2";            string filePath = string.Format("{0}\\{1}", dirPath, "test.txt");            //判断当前目录是否存在            if (!Directory.Exists(dirPath))            {                //创建目录                Directory.CreateDirectory(dirPath);                Console.WriteLine("创建一个目录{0}", dirPath);            }            else            {                Console.WriteLine("目录{0}已存在", dirPath);            }            //实例化文件对象            FileInfo file = new FileInfo(filePath);            //判断文件是否存在            if (!file.Exists)            {                //创建文件                file.Create();                Console.WriteLine("创建文件{0}",filePath);            }            else            {                Console.WriteLine("文件{0}已存在", filePath);            }            Console.ReadKey();        }    }}