public static void RestartComputers()
        {
            ManagementObjectCollection instances;
            List<string> ComputerNames = GetComputers();
            foreach (var i in ComputerNames)
            {
                try
                {
                    string computerPath = string.Format(@"\{0}rootcimv2", i);
                    ConnectionOptions options = new ConnectionOptions();
                    options.Impersonation = System.Management.ImpersonationLevel.Impersonate;
                    //options.EnablePrivilages = true;
                    //or
                    //options.Username = "username";
                    //options.Password = "password";
                    //options.Authority = "";
                    ManagementScope scope = new ManagementScope(computerPath, options);
                    scope.Connect();

                    ManagementPath osPath = new ManagementPath("Win32_OperatingSystem");
                    ManagementClass os = new ManagementClass(scope, osPath, null);
                    instances = os.GetInstances();


                }
                catch (Exception)
                {

                    throw;
                }

                foreach (ManagementObject instance in instances)
                {
                    object result = instance.InvokeMethod("Reboot", new object[] { });
                    uint returnValue = (uint)result;

                    if (returnValue != 0)
                    {
                        throw new Exception();
                    }
                }
            }
        }