c# 递归异步获取本地驱动器下所有文件

//获取所有驱动器
           string[] drives = Environment.GetLogicalDrives();
           foreach (string driver in drives)
           {
               Console.WriteLine(driver);
               //驱动器信息
               DriveInfo di = new DriveInfo(driver);
               //是否准备好
               Console.WriteLine("isRead:" + di.IsReady);
               //名称
               Console.WriteLine("name:" + di.Name);
               //驱动器根目录
               DirectoryInfo root = di.RootDirectory;
               RecursiveAsync(root);
               Console.WriteLine();
           }
           Console.ReadKey();

//方法体

private async static void RecursiveAsync(DirectoryInfo root)
       {
           await Task.Run(() =>
           {
               try
               {
                   //得到所有文件
                   FileInfo[] fis = root.GetFiles("*.*");
                   if (fis != null && fis.Length > 0)
                   {
                       foreach (FileInfo fi in fis)
                       {
                           //文件名
                           string name = fi.FullName;
                           name = name.Length > 100 ? name.Substring(0, 100) + "…" : name;
                           Console.WriteLine(name);
                       }
                   }
                   //获取子目录
                   DirectoryInfo[] dis = root.GetDirectories();
                   //存在子目录
                   foreach (DirectoryInfo di in dis)
                   {
                       //递归子目录
                       RecursiveAsync(di);
                   }
               }
               catch (Exception e)
               {
                   Console.WriteLine(e.Message);
               }
           });
       }