System.directoryservices.dll is not woking perfectly

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I changed a website target Framework was changed from 3.5 to 4. hence it modified the web config too.

after that I have added the system.diresctory.dll into my project and it also been added to my project and webconfig.

but when I code in aspx.cs file it shows missing assembly reference.

please help me.

XML

<assemblies>
        <add assembly="System.Core, Version=3.5.0.0, Culture=neutral, PublicKeyToken=B77A5C561934E089"/>
        <add assembly="System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/>
        <add assembly="System.Data.DataSetExtensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=B77A5C561934E089"/>
        <add assembly="System.Xml.Linq, Version=3.5.0.0, Culture=neutral, PublicKeyToken=B77A5C561934E089"/>
        <add assembly="System.Windows.Forms, Version=2.0.0.0, Culture=neutral, PublicKeyToken=B77A5C561934E089"/>
        <add assembly="System.DirectoryServices, Version=4.0.0.0, Culture=neutral, PublicKeyToken=B03F5F7F11D50A3A"/>
        <add assembly="System.DirectoryServices, Version=2.0.0.0, Culture=neutral, PublicKeyToken=B03F5F7F11D50A3A"/>
      </assemblies>
    </compilation>

Posted 14-Aug-13 0:11am

sathish kumar

Updated 14-Aug-13 1:09am

Richard MacCutchan

v3

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Sergey Alexandrovich Kryukov · Answer 1 · 2013-08-14T00:52:00

Solution 1

I don't know how did you get the list of assemblies shown in the question, but it looks like your problem is having some assemblies of old versions. Remove them, replace with v.4. Simply remove all references and add again.

—SA

Posted 14-Aug-13 0:52am

Sergey Alexandrovich Kryukov

Comments

Sergey Alexandrovich Kryukov 14-Aug-13 7:09am

No! don't copy, they are obsolete. Create some project from scratch. Use "Add reference" and click on required assemblies (".NET" tab). You will see what are the correct versions.
—SA

[no name] 14-Aug-13 10:30am

Please remove the references from the project and add them one by one from the library once again. Make sure the dlls are for the 4.0 not for 3.5.