remote sqlserver database backup and restore

<add key ="BACKUP_DATABASE_SERVER" value ="Data Source=admin\SQLEXPRESS;User ID=****;Password=****;"/>

SERVER_NAME=admin\SQLEXPRESS;
 Server srv = new Server(SERVER_NAME);

            //DataTable dtServers = SmoApplication.EnumAvailableSqlServers(true);

            
            ServerConnection srvConn = srv.ConnectionContext;
            srvConn.LoginSecure = true;
            //string strBackupDir = srv.Settings.BackupDirectory;
            DatabaseCollection objDatabases =srv.Databases;