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涉及到的类：File，FileStream，FileInfo，Directory，DirectoryInfo，FileStream，StreamWriter等

封装成一个类

using System;using System.IO;public class FileCtrler{    /// 
    /// 获取某路径下的所有文件信息    /// 
    public static FileInfo[] getAllFileFromDirectory(string path)    {        DirectoryInfo folder = new DirectoryInfo(path);        if (folder.Exists)            return folder.GetFiles();        else            return null;    }    /// 
    /// 根据目录获取某文件信息    /// 
    public static FileInfo getFileFromDirectory(string path)    {        FileInfo file = new FileInfo(path);        return file;    }    /// 
    /// 获取某目录下的文件路径    /// 
     public static string[] getAllFilePathFromDirectory(string path, string searchPatton = "*.bytes", SearchOption searchOption = SearchOption.AllDirectories)    {        return Directory.GetFiles(path, searchPatton, searchOption);    }    /// 
    /// 在指定目录下创建文件    /// 
    public static void CreateFile(string path,string fileName)    {        string fullPath = string.Format("{0}/{1}", path, fileName);        if (File.Exists(fullPath))            File.Delete(fullPath);        if(Directory.Exists(path))        {            FileStream fs = File.Create(fullPath);            fs.Close();        }        else        {            Console.WriteLine("文件目录不存在");        }    }    /// 
    /// 对文件写入行    /// 
    public static void WriteLine2File(string fullPath,string text)    {        if(File.Exists(fullPath))        {            using (StreamWriter sw = File.AppendText(fullPath))            {                sw.WriteLine(string.Format("{0}{1}", DateTime.Now.ToString("MM-dd HH:mm:ss"), text));            }        }    }    /// 
    /// 二进制读取某文件    /// 
    /// 文件路径    /// 读取回调,比如解析二进制数据    public static void BinaryReadFile(string path,System.Action
   
     readCb = null)    {        if(File.Exists(path))        {            //FileStream fs = new FileStream(path, FileMode.Open, FileAccess.Read);            FileStream fs = File.OpenRead(path);            BinaryReader rd = new BinaryReader(fs);            readCb?.Invoke(rd);            rd.Close();            fs.Close();        }    }}
   

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