Creating an ASP.NET Project provides for a .sln file, but you cannot add an App_Code directory--at least not one recognized by the IDE for purposes of compilation (this is confirmed throughout the internet).

Creating a Web Site does not provide for a .sln file, but you can add an App_Code directory.

In the downloaded TBH code, there is both a .sln file and an App_Code directory which the IDE apparently recognizes, because there's no problem with the Build.

It's my impression that the author started out with a Web Site rather than a Project (the Publish Web Site dialog box is different between the two).

If all this is true, how can it be that there is both a .sln file and an App_Code directory?

I don't know if the site built in this book is a Web Site or a Web Application, but I do know that you can have a .sln file for a web site.

What a Web Site doesn't have is a proj file (e.g. csproj or vbproj) to relate all files in the site as a web site project is simply a folder. But you can have a .sln file that refers to the web site project and possible other projects that are part of the solution such as a class library.

Hope this helps,

Imar

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Imar Spaanjaars
http://Imar.Spaanjaars.Com
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Author of Beginning ASP.NET 4.5 : in C# and VB, Beginning ASP.NET Web Pages with WebMatrix
and Beginning ASP.NET 4 : in C# and VB.
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