How to detect if machine is joined to domain?

Question

How do I detect whether the machine is joined to an Active Directory domain (versus in Workgroup mode)?

Answer 1

ManagementObject cs;
        using(cs = new ManagementObject("Win32_ComputerSystem.Name='" + System.Environment.MachineName + "'" ))
        {
            cs.Get();
            Console.WriteLine("{0}",cs["domain"].ToString());
        }

That should allow you to get the domain. I believe it will be null or empty if you are part of a workgroup and not a domain.

Make sure to reference System.Management