Code:
BACKUP DATABASE Northwind TO DISK = 'c:\backup'

Code:

        public static void BackupDatabase(string strConnString, string backUpName, string backUpPath, DateTime datumIsteka)
        {
            try
            {
                string dbName;
                using (SqlConnection cnn = new SqlConnection(strConnString))
                {
                    cnn.Open();
                    dbName = cnn.Database.ToString();

                    ServerConnection sc = new ServerConnection(cnn);
                    Server sv = new Server(sc);

                    
                    // Create backup device item for the backup
                    BackupDeviceItem bdi = new BackupDeviceItem(backUpPath+"\\" + backUpName+".bak", DeviceType.File);

                    // Create the backup informaton
                    Backup bk = new Backup();
                    bk.Devices.Add(bdi);
                    bk.Action = BackupActionType.Database;
                    bk.BackupSetDescription = "SQL Express backuping..!";
                    bk.BackupSetName = backUpName;
                    bk.Database = dbName;
                    bk.ExpirationDate = datumIsteka;
                    bk.LogTruncation = BackupTruncateLogType.Truncate;

                    // Run the backup
                    bk.SqlBackup(sv);
                    System.Windows.Forms.MessageBox.Show("BackUp je uspješno izveden!");
                }
            }
            catch (System.Exception ex)
            {
                System.Windows.Forms.MessageBox.Show(ex.Message);
            }
        }

        public static void RestoreBackup(string strConnString, string backResName, string restorePathWithFileName)
        {
            try
            {
                string dbName;
                using (SqlConnection cnn = new SqlConnection(strConnString))
                {
                    cnn.Open();
                    dbName = cnn.Database.ToString();
                    cnn.ChangeDatabase("master");

                    ServerConnection sc = new ServerConnection(cnn);
                    Server sv = new Server(sc);

                   
                    // Create backup device item for the backup
                    BackupDeviceItem bdi = new BackupDeviceItem(restorePathWithFileName, DeviceType.File);
                    
                    // Create the restore object
                    Restore resDB = new Restore();
                    resDB.Devices.Add(bdi);
                    resDB.NoRecovery = false;
                    resDB.ReplaceDatabase = true;
                    resDB.Database = dbName;
                    
                    // Restore the database
                    resDB.SqlRestore(sv);
                    System.Windows.Forms.MessageBox.Show("Restauracija je uspješno izvedena!");
                }
            }
            catch (System.Exception ex)
            {
                System.Windows.Forms.MessageBox.Show(ex.Message);
            }
            
        }