try
            {
                ConnectionOptions connection = new ConnectionOptions();
                connection.Username = userNameBox.Text;
                connection.Password = passwordBox.Text;
                connection.Authority = "ntlmdomain:DOMAIN";

                ManagementScope scope = new ManagementScope(
                    "\\\\FullComputerName\\root\\CIMV2", connection);
                scope.Connect();

                ObjectQuery query= new ObjectQuery(
                    "SELECT * FROM Win32_LogicalDisk"); 

                ManagementObjectSearcher searcher = 
                    new ManagementObjectSearcher(scope, query);

                foreach (ManagementObject queryObj in searcher.Get())
                {
                    Console.WriteLine("-----------------------------------");
                    Console.WriteLine("Win32_LogicalDisk instance");
                    Console.WriteLine("-----------------------------------");
                    Console.WriteLine("FreeSpace: {0}", queryObj["FreeSpace"]);
                    Console.WriteLine("Size: {0}", queryObj["Size"]);
                }
              
            }
            catch(ManagementException err)
            {
                MessageBox.Show("An error occurred while querying for WMI data: " + err.Message);
            }
            catch(System.UnauthorizedAccessException unauthorizedErr)
            {
                MessageBox.Show("Connection error (user name or password might be incorrect): " + unauthorizedErr.Message);
            }