1:   

   2:  using System;

   3:  using System.IO;

   4:     

   5:  namespace EnumerateDrives

   6:  {

   7:      class Program

   8:      {

   9:          static void Main(string[] args)

  10:          {

  11:              var drives = DriveInfo.GetDrives();

  12:              foreach (var drive in drives)

  13:              {

  14:                  try 

  15:                  {

  16:                     Console.WriteLine(String.Format("{0}: totalspace:{1}gb free:{2}gb", 

  17:                          drive.Name, 

  18:                          drive.TotalSize/1024/1024/1024,

  19:                          drive.TotalFreeSpace/1024/1024/1024));

  20:                  }

  21:                  catch(Exception ex)

  22:                  {

  23:                      Console.WriteLine(ex.Message);

  24:                  }

  25:              }

  26:              Console.ReadKey();

  27:          }

  28:     }

  29:  }