manual install of system service

[Pawel Janik]

Hello.

I want to install new system service, but not using instalutil, but manualy,
from my application. There is my code, that should do this:

Installer installer = new Installer();
ServiceProcessI nstaller spi = new ServiceProcessI nstaller();
spi.Account = ServiceAccount. User;

ServiceInstalle r si = new ServiceInstalle r();
si.ServiceName = "TJ";
si.DisplayName = "Test Janos";

si.StartType = ServiceStartMod e.Manual;
si.Committed += new InstallEventHan dler(CommittedE ventHandler);

installer.Insta llers.Add(si);
installer.Insta llers.Add(spi);
ListDictionary state = new ListDictionary( );

installer.Insta ll(state);

but it throws:

Unhandled Exception: System.NullRefe renceException: Object reference not set
to
an instance of an object.
at System.ServiceP rocess.ServiceI nstaller.Instal l(IDictionary stateSaver)
at System.Configur ation.Install.I nstaller.Instal l(IDictionary stateSaver)
at test.MainClass. Main(String[] args) in Main.cs:line 34

Have anybody any idea, what can i do wrong?

regards,
Pawel Janik