How to Backup and Restore .bak file using C# 2010

references :
http://www.geekpedia.com/tutorial180_Backup-and-restore-SQL-databases.html
http://www.codeproject.com/Articles/123441/SQL-Server-2008-Backup-and-Restore-Databases-using
http://www.c-sharpcorner.com/uploadfile/rohatash/restore-sql-server-backup-file-with-c-sharp/
http://manish4dotnet.blogspot.com/2013/03/RestoreDataBaseusingCSharp.html
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//Using namespaces :
// these namespace found in "c:\Program Files (x86)\Microsoft SQL Server\100\SDK\Assemblies\"
using Microsoft.SqlServer.Management.Common;
using Microsoft.SqlServer.Management.Smo;
using Microsoft.SqlServer.Management.Smo.SqlEnum;
using System.Collections.Specialized;

                 ServerConnection srvConn = new ServerConnection(Environment.MachineName);

                //my SQL user doesnt have sufficient permissions,

                //so i am using my windows account

                srvConn.LoginSecure = true;

                //connection.LoginSecure = false;

                //connection.Login = "testuser";

                

                //connection.Password = "testuser";

             


  public static void RestoreDB(string backUpFilePath, string databaseName)
        {
            try
            {

                Restore restore = new Restore();

                //Set type of backup to be performed to database

                restore.Database = databaseName;

                restore.Action = RestoreActionType.Database;

                // Replace the Db if already exists

                restore.ReplaceDatabase = true;

                //Set up the backup device to use filesystem.         

                restore.Devices.AddDevice(backUpFilePath, DeviceType.File);

                //set ReplaceDatabase = true to create new database

                //regardless of the existence of specified database

                restore.ReplaceDatabase = true;

                //If you have a differential or log restore to be followed,

                //you would specify NoRecovery = true

                restore.NoRecovery = false;

                Server sqlServer = new Server(srvConn);

                //SqlRestore method starts to restore database           

                restore.SqlRestore(sqlServer);

                MessageBox.Show("Restore operation succeeded");

            }
            catch (Exception ex)
            {
                MessageBox.Show("Restore operation failed");
                MessageBox.Show(ex.Message);
            }
            Console.ReadLine();
        }
===============================
AND to call this Method :

RestoreDB(@"C:\Program Files (x86)\Microsoft SQL Server\MSSQL10_50.MSSQLSERVER\MSSQL\Backup\SmallStoreme.bak", "SmallStore");

===============================
  public static void BackUpDB(string databaseName)
        {

                 // If there was a SQL connection created

                  // Create a new backup operation

                    Backup bkpDatabase = new Backup();

                    // Set the backup type to a database backup

                    bkpDatabase.Action = BackupActionType.Database;

                    // Set the database that we want to perform a backup on

                    bkpDatabase.Database =databaseName;

                    // Set the backup device to a file

                    BackupDeviceItem bkpDevice = new BackupDeviceItem(saveBackupDialog.FileName,    

                           DeviceType.File);

                    // Add the backup device to the backup

                    bkpDatabase.Devices.Add(bkpDevice);

                    // Perform the backup

                    bkpDatabase.SqlBackup(srvSql);

         }
===============================
AND to call this Method :

BackUpDB("SmallStore");

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