External file containing <connectionStrings> config section

Is it possible to place <connectionStrings> settings in an external file from the web.config such that the Subsonic classes and the Subsonic Add-in to Visual Studio can access appropriately?

I've tried unsuccessfully using the Enterprise Library Configuration Edit tool to specify an external file source, placing the <connectionStrings> section in that file.  I'm using Visual Studio Team System 2008 Development edition.

I'm trying to achieve the same functionality as the <appSettings> section, which has a "file=" attribute that allows specifying an external file so Dev, UAT, and Production  app settings can be applied  by file name.  Unfortunately, the <connectionStrings> section does not allow the "file=" attribute.

Any help or suggestions greatly appreciated.

Try this

<connectionStrings configSource="connectionString.config" />

 Thanks!  That does what I need and Subsonic adjusted just fine and found the connection string!