How To Get The Disk Information In C#

DriveInfo[] allDrives = DriveInfo.GetDrives();
            dataGridView1.Columns.Add("Name", "Name");
            dataGridView1.Columns.Add("DriveType", "Drive Type");
            dataGridView1.Columns.Add("VolumeLabel", "Volume Label");
            dataGridView1.Columns.Add("DriveFormat", "Drive Format");
            dataGridView1.Columns.Add("AvailableFreeSpace", "Available Free Space");
            dataGridView1.Columns.Add("TotalFreeSpace", "Total Free Space");
            dataGridView1.Columns.Add("TotalSize", "Total Size");

            foreach (DriveInfo d in allDrives)
            {
                if (d.IsReady == true)
                {
                    double AFS =Math.Round( (Convert.ToDouble(d.AvailableFreeSpace) / 1024) / 1024/1024);
                    double TFS = Math.Round((Convert.ToDouble(d.TotalFreeSpace) / 1024) / 1024/1024);
                    double TS = Math.Round((Convert.ToDouble(d.TotalSize) / 1024) / 1024/1024);
                    dataGridView1.Rows.Add(d.Name, d.DriveType, d.VolumeLabel, d.DriveFormat, AFS+" GB", TFS + " GB", TS + " GB");
                }
            }