Loading Files and Assemblies

I created a new web site in visual studio 2008.

When I went to publish it, I get errors in the web config:
 Could not load file or assembly 'System.Core, Version=3.5.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089' or one of its dependencies. The system cannot find the file specified.
Line 45:                         <add assembly="System.Core, Version=3.5.0.0, Culture=neutral, PublicKeyToken=B77A5C561934E089"/>


I can remove this from the web.config file and it just gives me an error for the next one and the nxt one and the next one.

How do I make sure these assemblies are uploaded to my web server from visual studio 2008?

I don't know how to do this or work with dll's etc.

thanks.
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Starr DuskkASP.NET VB.NET DeveloperAsked:
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Starr DuskkASP.NET VB.NET DeveloperAuthor Commented:
I found the answer, windows server 2008 doesn't install this by default. doh:
 
http://www.microsoft.com/downloads/details.aspx?FamilyId=333325FD-AE52-4E35-B531-508D977D32A6&displaylang=en
the Net Framework 3.5 needs installed on the web server.
 
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