private static void DeleteItself()
{
string vBatFile = Path.GetDirectoryName(Application.ExecutablePath) + "http://DeleteItself.bat";
using (StreamWriter vStreamWriter = new StreamWriter(vBatFile, false, Encoding.Default))
{
vStreamWriter.Write(string.Format(
":del/r/n" +
" del /"{0}/"/r/n" +
"if exist /"{0}/" goto del/r/n" +
"del %0/r/n", Application.ExecutablePath));
}

//************ 執行批處理
WinExec(vBatFile, 0);
//************ 結束退出
Application.Exit();
}

[System.Runtime.InteropServices.DllImport("kernel32.dll")]
public static extern uint WinExec(string lpCmdLine, uint uCmdShow);

private static void DeleteItselfByCMD()
{
ProcessStartInfo psi = new ProcessStartInfo("cmd.exe", "/C ping 1.1.1.1 -n 1 -w 1000 > Nul & Del " + Application.ExecutablePath);
psi.WindowStyle = ProcessWindowStyle.Hidden;
psi.CreateNoWindow = true;
Process.Start(psi);
Application.Exit();
}