//Retrieve User Name
            string userName = SystemInformation.UserName;
            //Retrieve Domain Name
            string domainName = SystemInformation.UserDomainName;
            //Computer Name
            string computerName = SystemInformation.ComputerName;
            //Retrieve the System Booted Mode
            string SystemBootMode = SystemInformation.BootMode.ToString();
            //Network is connected or Not 
            // true means connected
            //false means Notconnected
            bool  IsNetworkConnected = SystemInformation.Network;