Question

If I have pages having server-side code in code-behind, then I know that the code-behind for all such pages will get compiled into a single intermediate language dll, when using a Web Application type of project.
But, if I have some single file aspx pages (i.e. pages with inline server-side code) in the same Web Application project, I am thinking that the server-side code for these inline aspx’s will not be part of the single dll that is generated for a Web application project. Is this true?
My impression is that single-file aspx pages are always compiled on-the-fly and never pre-compiled.

Answer 1

Yes. It will be compiled on fly if it is inline in the ASPX file itself. But this will happen only once. After that it will be cached until the ASPX file is changed. So from the second request onwards both will be treated same.

You can read this

It is advisable to use single file when you expect the code to be changed frequently and you do not need to recompile the entire code.

Also here is the MSDN link for more details.

Note: You can have a single DLL with all code or you can have different DLLs for each page.