C#

public void BackupDatabase(String databaseName,  String destinationPath)
{
    Backup sqlBackup = new Backup();

    sqlBackup.Action = BackupActionType.Database;
    sqlBackup.BackupSetDescription = "FollowUPBackUP:" + DateTime.Now.ToShortDateString();
    sqlBackup.BackupSetName = "FollowUP";

    sqlBackup.Database = databaseName;

    BackupDeviceItem deviceItem = new BackupDeviceItem(destinationPath, DeviceType.File);
    string instantname = @".\sqlexpress";
    ServerConnection connection = new ServerConnection(instantname);
    Server sqlServer = new Server(connection);

    Database db = sqlServer.Databases[databaseName];

    sqlBackup.Initialize = true;
    sqlBackup.Checksum = true;
    sqlBackup.ContinueAfterError = true;

    sqlBackup.Devices.Add(deviceItem);
    sqlBackup.Incremental = false;

    sqlBackup.ExpirationDate = DateTime.Now.AddDays(10);
    sqlBackup.LogTruncation = BackupTruncateLogType.Truncate;

    sqlBackup.FormatMedia = false;

    sqlBackup.SqlBackup(sqlServer);
}