调试易

 private string GetUserName()
        {
            try
            {
                string name = string.Empty;
                ManagementClass mc = new ManagementClass("Win32_ComputerSystem");
                ManagementObjectCollection moc = mc.GetInstances();                foreach (ManagementObject mo in moc)
                {
                    name = mo["UserName"].ToString();
                }                moc = null;
                mc = null;                return name;
            }
            catch
            {
                return "unknow";
            }
        }