Changing registry permission

I want to change th开发者_StackOverflow中文版e permission of a registry key, and I want to set it as a read only. How can I do this?

I tried this way, but it doesn't change anything:

RegistryPermission rp = new RegistryPermission(
    RegistryPermissionAccess.Read,
    "HKEY_LOCAL_MACHINE\\SOFTWARE\\paci_1\\identity\\ASPNET_SETREG"
);
rp.AddPathList(
    RegistryPermissionAccess.Read,
    "HKEY_LOCAL_MACHINE\\SOFTWARE\\paci_1\\identity\\ASPNET_SETREG"
);

Also, how can I do it for a user or administrator or owner etc?

I think the class you want is RegistrySecurity. It's documented here.

It should look something like this:

using(RegistryKey rk =   
    Registry.LocalMachine.OpenSubKey(@"SOFTWARE\paci_1\identity\ASPNET_SETREG") )
{
    string gname = Environment.UserDomainName + @"\" + Environment.UserName;   
    RegistrySecurity rs = new RegistrySecurity();
    rs.AddAccessRule(new RegistryAccessRule(gname, RegistryRights.ReadKey, AccessControlType.Allow));
    rk.SetAccessControl(rs);
}

Of course, you would replace gname with the domain-qualified username of your choice.