System.DirectoryServices for VS2010

I am trying to retrieve user info  using/import System.DirectoryServices;
I tried writing code in both VB and C# but got the same results.  When I place the code below in VS2008 and add the DirectoryServices reference, all works fine (plus I see the web config with the assembly reference.   When I try the code in vs2010 it seems to hang on the search FindOne().  I also do NOT see a reference in the web.config.  But I am new to VS2010 so I am not sure about this…..

Could this also be IIS related?  I am running this IIS 5.1….
<add assembly="System.DirectoryServices, Version=2.0.0.0, Culture=neutral, PublicKeyToken=B03F5F7F11D50A3A"/>

        Try
            Dim search As New DirectorySearcher()
            search.Filter = [String].Format("(SAMAccountName={0})", "user")
            search.PropertiesToLoad.Add("samaccountname")
            search.PropertiesToLoad.Add("givenname")
            search.PropertiesToLoad.Add("sn")
            Dim result As SearchResult = search.FindOne()

            If result Is Nothing Then
                Return False
            Else
                Return True
            End If
        Catch generatedExceptionName As Exception
            Return False
        End Try
jsegAsked:
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varunvnsCommented:
Hi,

just checkout in the project of VS2010, which framework you considered as the target framework.

It may happen that you selected 4.0 which might not have your req code..

Just a guess!

Hope this helps!
Regards,
Varun Shringarpure
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jsegAuthor Commented:
Thanks.... I was missing  code in web.config

            <compilation debug="true" targetFramework="4.0">
                  <assemblies>
                        <add assembly="System.DirectoryServices, Version=4.0.0.0, Culture=neutral, PublicKeyToken=B03F5F7F11D50A3A"/></assemblies></compilation>
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