step-2: A dialog opened,then click on the Add button.

Step-3: a Dialog opened,then browse and select the mdf file

Step-4: Attached DB file will be seen in dialog box.
click ok then.

If everything ok then u will see the database name
under database folder.

to detach the database just right click on the name of
the database and select detach and proceed.

If u have any questions regarding attach and detach
databases feel free to contact me