problem updating reference in my web app

I recently just upgraded to VisualStudio 2008 and noticed that the 'update reference' is now gone when right clicking on an assembly in the bin folder of a web application project.  

For example, I created a class library project, compiled and added the reference in my web application project.  After modifying the class library project and re-compiling, the changes aren't getting picked up in my web app project.  I don't see how to update the reference.  I tried removing the reference and re-adding, but it still does not pick up the changes I made.  I don't know what is going on?

What am I missing?  How do you update a reference to an assembly in a web application project?

Thanks for any help.
-Dman100-Software ConsultantAsked:
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It should pick your updated dll in your application. If for any reason it didn't pick it up, try a "Clean Solution" under the "Build" menu.

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-Dman100-Software ConsultantAuthor Commented:
I noticed that many of the changes I had made to the dll in my application were automatically updated.  However, last night, I made some changes such as adding [System.ComponentModel.DataObject] to my business logic classes with the DataObjectMethodAttribute attributes to the methods in my classes so that they would recognized by the ObjectDataSource control as bindable.  Those changes weren't immediately picked up.

Then when I modified and added some new methods to my classes, those weren't and still haven't been updated in my web application project.  I've re-compiled and the assembly compiles fine, but the web app doesn't see the new changes.

I'll give the Build >> Clean Solution a try this evening when I get back to my home office.  I'll report back and let you know if that resolves the issue.

Anything else I should try if for whatever reason that does not work?

Thanks for the help.
Maybe close and reopen the project? Sounds silly but who knows? It might just be a cache issue.
-Dman100-Software ConsultantAuthor Commented:
Hi Priariedog,

I tried a Build >> Clean Solution but that sitll didn't update the reference to my dll...strange?

I removed the reference completely and deleted the dll and pdf file out of the bin folder and then re-added the reference to the dll.  That finally picked up the changes.

I hope I don't have to do that all the time.
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