Refresh File (VS 2005)

While working with a web site and some solution item references I came a cross a situation that I was not able to tell where the web site saved the reference to the solution items,
I search everywhere Solution file + Web.config and nothing came up, than I remembered that I saw a file with extension ".Refresh" under the Bin/ inside it there was the address of the DLL that was reference.
After investigating some more (with the help a fellow colleague- Evyatar Ben Shitrit) we found that the VS 2005 deals with reference who are our of the project directory by writing the reference into a refresh file that is auto populated (because there is no web project – this is the best solution)
* Don’t forget that you have to add the file to the source control.
Look at the following article about Web Project Settings Conversion for more details.