Backup and restore

Question

my data base if AssetTracking.mdf and AssetTracking.mdf datasource is
myDataSource = @"Data Source=.\SQLEXPRESS;AttachDbFilename=@"D:\main\int\AssetTracking.mdf;Integrated Security=True;Connect Timeout=30;User Instance=True";

and i want to backup and restore of database AssetTracking from it's Data Source in sql server 2005