unity C# 获取有关文件、文件夹和驱动器的信息

 class FileSysInfo
 {
     static void Main()
     {
         // You can also use System.Environment.GetLogicalDrives to
         // obtain names of all logical drives on the computer.
         System.IO.DriveInfo di = new System.IO.DriveInfo(@"C:\");
         Console.WriteLine(di.TotalFreeSpace);
         Console.WriteLine(di.VolumeLabel);

         // Get the root directory and print out some information about it.
         System.IO.DirectoryInfo dirInfo = di.RootDirectory;
         Console.WriteLine(dirInfo.Attributes.ToString());

         // Get the files in the directory and print out some information about them.
         System.IO.FileInfo[] fileNames = dirInfo.GetFiles("*.*");

         foreach (System.IO.FileInfo fi in fileNames)
         {
             Console.WriteLine("{0}: {1}: {2}", fi.Name, fi.LastAccessTime, fi.Length);
         }

         // Get the subdirectories directly that is under the root.
         // See "How to: Iterate Through a Directory Tree" for an example of how to
         // iterate through an entire tree.
         System.IO.DirectoryInfo[] dirInfos = dirInfo.GetDirectories("*.*");

         foreach (System.IO.DirectoryInfo d in dirInfos)
         {
             Console.WriteLine(d.Name);
         }

         // The Directory and File classes provide several static methods
         // for accessing files and directories.

         // Get the current application directory.
         string currentDirName = System.IO.Directory.GetCurrentDirectory();
         Console.WriteLine(currentDirName);           

         // Get an array of file names as strings rather than FileInfo objects.
         // Use this method when storage space is an issue, and when you might
         // hold on to the file name reference for a while before you try to access
         // the file.
         string[] files = System.IO.Directory.GetFiles(currentDirName, "*.txt");

         foreach (string s in files)
         {
             // Create the FileInfo object only when needed to ensure
             // the information is as current as possible.
             System.IO.FileInfo fi = null;
             try
             {
                  fi = new System.IO.FileInfo(s);
             }
             catch (System.IO.FileNotFoundException e)
             {
                 // To inform the user and continue is
                 // sufficient for this demonstration.
                 // Your application may require different behavior.
                 Console.WriteLine(e.Message);
                 continue;
             }
             Console.WriteLine("{0} : {1}",fi.Name, fi.Directory);
         }

         // Change the directory. In this case, first check to see
         // whether it already exists, and create it if it does not.
         // If this is not appropriate for your application, you can
         // handle the System.IO.IOException that will be raised if the
         // directory cannot be found.
         if (!System.IO.Directory.Exists(@"C:\Users\Public\TestFolder\"))
         {
             System.IO.Directory.CreateDirectory(@"C:\Users\Public\TestFolder\");
         }

         System.IO.Directory.SetCurrentDirectory(@"C:\Users\Public\TestFolder\");

         currentDirName = System.IO.Directory.GetCurrentDirectory();
         Console.WriteLine(currentDirName);

         // Keep the console window open in debug mode.
         Console.WriteLine("Press any key to exit.");
         Console.ReadKey();
     }
 }