remote wmi connection c# - invalid parameter error

Question

when i run the following code

ConnectionOptions options = new ConnectionOptions();
        options.EnablePrivileges = true;
        options.Impersonation = ImpersonationLevel.Impersonate;
        options.Authentication = AuthenticationLevel.Packet;
        options.Authority = "ntdlmdomain:InsTIL.com";
        options.Username = "instil" + @"\" + "admin";
        options.Password = "Pwd";

        ManagementScope scope= new ManagementScope(string.Format(@"\\172.16.2.171\root\cimv2"),options);
        scope.Connect();
        if (scope.IsConnected == true)
        {
           Console.WriteLine("Connection Succeeded");
        }
        else
        {
            Console.WriteLine("Connection Failed");
        }


        ObjectQuery query = new ObjectQuery("Select * from win32_operatingsystem");
        ManagementObjectSearcher searcher = new ManagementObjectSearcher(scope, query);

        ManagementObjectCollection querycollection = searcher.Get();
        foreach (ManagementObject mobj in querycollection)
        {
            Console.WriteLine("Computer name: {0}", mobj["csname"]);
            Console.WriteLine("Windows Directory : {0}", mobj["WindowsDirectory"]);
            Console.WriteLine("Operating System: {0}", mobj["Caption"]);
            Console.WriteLine("Version: {0}", mobj["Version"]);
            Console.WriteLine("Manufacturer : {0}", mobj["Manufacturer"]);
        }

i get following error

  Unhandled Exception: System.Management.ManagementException: Invalid parameter
   at System.Management.ManagementException.ThrowWithExtendedInfo(ManagementStatus errorCode)
    at System.Management.ManagementScope.InitializeGuts(Object o)
   at System.Management.ManagementScope.Initialize()
  at remote_wmi.Program.Main(String[] args) in E:\.net prep\.net examples\remote wmi\remote wmi\Program.cs:line 21

please help me to know why its happening.? what's wrong in this code? is we need to do any thing before executing this code? if yes, please specify it .

Thanks in advance.

Answer 1

I did the following changes then i got an answer.

1) i haven't specified the domain name with user name. options.Username = "admin"; instead of options.Username = "instil" + @"\" + "admin";

2) options.Authority = "ntlmdomain:InsTIL.com"; instead of options.Authority = "ntdlmdomain:InsTIL.com";