countkim,
The .sln file is not useful when hosting the application or running it with a Web server. The .sln file is the "Solution File" and contains the project information of Visual Studio.
The paths should be made relative the the root of the Web server (such as /dir/file.txt) and not absolute (such as
http://mysite/dir/file.txt). Do not reference also files on your hard disk from the Web application using hard coded paths (such as C:\dir1\dir2\file.txt).