Hi,
can anybody suggest me how to take backup and restore of sqlexpress.
I have used sqlexpress in my project i have little bit idea about taking backup and restore of sql server using SMO but unaware about sqlexpress. Can anybody help me please....

Thanks in Advance

You just need to use the appropriate SQL command.
I use something like this:
Backup -
"USE MASTER; BACKUP DATABASE [<DBName>] TO DISK = N'<FileName>' WITH FORMAT, INIT, NAME = N'<Backup Name>', SKIP"
Restore -
"USE MASTER; RESTORE DATABASE [<DBName>] FROM DISK = N'<FileName>' WITH FILE = 1, REPLACE"

Execute using the SQLCommand.ExecuteNonQuery method.

Note: I run the command in a service to ensure full access.
Not sure if it will work from a standard user program (which is probably why I do it from a service.)

Hi nick.crane, Can you explain the query in little bit detail

what is "USE MASTER",
Thanks in advance

The USE command changes to reference database for other commands.
I found I needed this to "disconnect" my current connection from the DB I was backing up otherwise the BACKUP did not always work.
Some examples of the BACKUP command are found here: How to: Create a Full Database Backup (Transact-SQL)
Full spec. for the BACKUP found here: BACKUP (Transact-SQL) (This also has links to Restore examples at the bottom.)