Regarding disk drives and spaces

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.IO;
using System.Data.Common;
using System.Data;


public partial class DriveThreshold : System.Web.UI.Page
{
    class Report
{
        public static void Main()
        {
            
        }
}

    protected void Page_Load(object sender, EventArgs e)
    {
        
    }



    protected void DriveInfo_Click(object sender, EventArgs e)
    {

        DriveInfo[] allDrives = DriveInfo.GetDrives();

        foreach (DriveInfo d in allDrives)
        {
            Console.WriteLine("Drive {0}", d.Name);
            Console.WriteLine("Drive type: {0}", d.DriveType);
            if (d.IsReady == true)
            {
                Console.WriteLine("Volume label: {0}", d.VolumeLabel);
                Console.WriteLine("File system: {0}", d.DriveFormat);
                Console.WriteLine("Available space to current user:{0, 15} bytes", d.AvailableFreeSpace);

                Console.WriteLine("Total available space:          {0, 15} bytes", d.TotalFreeSpace);

                Console.WriteLine("Total size of drive:            {0, 15} bytes ", d.TotalSize);

                DataTable dt = new DataTable();
                dt.Columns.Add("Drive");
                dt.Columns.Add("Drive type");
                dt.Columns.Add("Volume label");

                dt.Columns.Add("Available space to current user");
                dt.Columns.Add("Total available space");
                dt.Columns.Add("Total size of drive");


                DataRow dr = dt.NewRow();
                dr[0] = d.Name;
                dr[1] = d.DriveType;
                dr[2] = d.VolumeLabel;

                dr[3] = d.AvailableFreeSpace;
                dr[4] = d.TotalFreeSpace;
                dr[5] = d.TotalSize;

                dt.Rows.Add(dr);
                GridView1.DataSource = dt;
                GridView1.DataBind();
            }
        } 
    }
   
}