PathHelper.cs

namespace Helpers{    using System;    using System.Collections.Generic;    using System.IO;    using System.Linq;    using System.Security.Cryptography;    public static class PathHelper    {        /// <summary>        /// 创建指定路径        /// </summary>        /// <param name="path"></param>        /// <returns></returns>        public static bool Create(string path)        {            try            {                Directory.CreateDirectory(path);                return true;            }            catch            {                return false;            }        }        /// <summary>        /// 获得文件目录        /// </summary>        /// <param name="path">目录路径</param>        /// <returns></returns>        public static List<FileInfo> GetFileList(string path)        {            try            {                return Directory.GetFiles(path).Select(filePath => new FileInfo(filePath)).ToList();            }            catch            {                return null;            }        }        /// <summary>        /// 擦除文件        /// </summary>        /// <param name="filename"></param>        /// <param name="timesToWrite"></param>        public static void WipeFile(string filename, int timesToWrite)        {            try            {                if (!File.Exists(filename)) return;                //设置文件的属性为正常，这是为了防止文件是只读的                File.SetAttributes(filename, FileAttributes.Normal);                //计算扇区数目                var sectors = Math.Ceiling(new FileInfo(filename).Length / 512.0);                // 创建一个相同大小的虚拟缓存                var dummyBuffer = new byte[512];                // 创建一个加密随机数生成器                var rng = new RNGCryptoServiceProvider();                // 打开这个文件的FileStream                var inputStream = new FileStream(filename, FileMode.Open, FileAccess.Write, FileShare.ReadWrite);                for (var currentPass = 0; currentPass < timesToWrite; currentPass++)                {                    // 文件流位置                    inputStream.Position = 0;                    //循环全部的扇区                    for (var sectorsWritten = 0; sectorsWritten < sectors; sectorsWritten++)                    {                        //把垃圾数据填充到流中                        rng.GetBytes(dummyBuffer);                        // 写入文件流中                        inputStream.Write(dummyBuffer, 0, dummyBuffer.Length);                    }                }                // 清空文件                inputStream.SetLength(0);                // 关闭文件流                inputStream.Close();                // 清空原始日期概要                var dt = new DateTime(2037, 1, 1, 0, 0, 0);                File.SetCreationTime(filename, dt);                File.SetLastAccessTime(filename, dt);                File.SetLastWriteTime(filename, dt);                // 删除文件                File.Delete(filename);            }            catch (Exception)            {                // ignored            }        }    }}