Opc.Ua.Configuration.ConfigUtils.GetComputerWorkgroupOrDomain C# (CSharp) Method

        public static string GetComputerWorkgroupOrDomain() 
        {
            SelectQuery query = new SelectQuery("Win32_ComputerSystem");

            ManagementObjectSearcher searcher = new ManagementObjectSearcher(query);

            foreach (ManagementObject item in searcher.Get()) 
            {
                return item["Domain"] as string;
            }

            return null;
        }