Server.AttachDatabase Method (String, StringCollection, AttachOptions)
Attaches an existing database that is made up of one or more files to the instance of SQL Server that has the specified name and using the specified data files and attachment options.
Assembly: Microsoft.SqlServer.Smo (in Microsoft.SqlServer.Smo.dll)
A StringCollection object value that contains a list database files.
The data and transaction log files of a database can be detached and then reattached to the same or another instance of SQL Server. Detaching and attaching a database is useful if you want to change the database to a different instance of SQL Server on the same computer, or if you want to move the database.