how to get backup in mysql database using visual studio 2010 c# codings

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C#

C#4.0

MySQL-Connector

i used this coding>>>>>>>>>>>>>>>>>>>>>>.but not woking
private void rbt_Backup_Click(object sender, EventArgs e)
{
string constring = "server=localhost;user=root;pwd=qwerty;database=test;";
string file = "D:\\backup.sql";
using (MySqlConnection conn = new MySqlConnection(constring))
{
using (MySqlCommand cmd = new MySqlCommand())
{
using (MySqlBackup mb = new MySqlBackup(cmd))
{
cmd.Connection = conn;
conn.Open();
mb.ExportToFile(file);
conn.Close();
}
}
}
}
Error Message::::::::
Error 1 Assembly 'MySqlBackup, Version=2.0.6.0, Culture=neutral, PublicKeyToken=null' uses 'MySql.Data, Version=6.9.5.0, Culture=neutral, PublicKeyToken=c5687fc88969c44d' which has a higher version than referenced assembly 'MySql.Data, Version=6.8.3.0, Culture=neutral, PublicKeyToken=c5687fc88969c44d' d:\MySqlBackup.dll Medical
i need mysqlbackup.dll version 4.0..
plz help..........