using System;
using System.IO;
using System.Management;

class PercentFree
{
    [STAThread]
    static void Main(string[] args)
    {
        string[] logicalDrives = Directory.GetLogicalDrives();
        for (int i=0; i<logicalDrives.Length; i++)
        {
            ManagementObject disk = new ManagementObject("win32_logicaldisk.deviceid=\""+logicalDrives[i].Substring(0,2)+"\"");
            disk.Get();

            UInt64 size = Convert.ToUInt64(disk["Size"]);
            UInt64 free = Convert.ToUInt64(disk["FreeSpace"]);

            Console.WriteLine("Disk "+logicalDrives[i]);
            Console.WriteLine("--------");
            Console.WriteLine("\tLogical Disk Size = " + size + " bytes");
            Console.WriteLine("\tFree Space = " + free + " bytes");
            if (size>0)
            {
                double percent = ((double)free/(double)size) * 100.0;
                Console.WriteLine("\tPercent Free = " + percent.ToString("##.##") + "%");
            }
            Console.WriteLine("");
        }
    }
}