C# – Are JPG, DOC, PDF, etc, files also compiled into an assembly

I think the problem may have to do with using a web site project, as oppossed to a Web Application. I can't remember off the top of my head, but there's something funky about the way web site projects are compiled, as oppossed to web application projects.

Only the sourcecode is compiled into the assembly, you still need to upload the aspx files into a matching directory on the server. For example you project in Visual Studio may look like the following:

WebProject1 (The root project)
  |
  |- some_SubDir (A physical directory inside the project)
      |
      |-default1.aspx
      |-default1.aspx.cs (assuming a C# project)

Once you have compiled the web app you'll need to upload the following to the server:

WebProject1 (The root directory for your website)
 |
 |-bin (The binary directory created by the build)
    |
    |-WebProject1.dll (The compiled source code of the web app)
 |-some_SubDir
    |
    |-default1.aspx (The file that will map to the URL www.websitename.com/some_subdir/default1.aspx)

Compiled resources (non-sourcecode files that are compiled and stored inside the assembly) are different issue that are addressed in your other question

Edited to add direct answers to the questions:

1. Not all files are compiled into the assembly, only source code files are. Links are maintained between the page and it's code behind file through a class declaration which by default is in a namespace that matches the directory structure, but it doesn't have to be.

2. Your default1.aspx file will have in the header something like:

The inherits line tells the webserver that when a user requests this page it should be processed in conjunction with the source code that defines that class, which it will find inside the compiled assembly. The combination of the physical aspx file and the compiled class will generate standard html which is then passed back to the client.

3. Yes, you need to create the same directory structure, but you are required to put the aspx files in there.

4. Yes

(can someone please edit this if they know how to get the list items to number correctly, please?)