System.DirectoryServices is not recognised in the namespace 'System'

Question

I'm trying to use System.DirectoryServices in a web site project and I'm getting this error:

The type or namespace name 'DirectoryServices' does not exist in the namespace 'System' (are you missing an assembly reference?)

My project has a reference to System.DirectoryServices in web.config:

<add assembly="System.DirectoryServices, Version=2.0.0.0, Culture=neutral, PublicKeyToken=B03F5F7F11D50A3A"/>   

And I do have using System.DirectoryServices in the files where I want to use it.

Does anybody have a clue where to look for the problem?

Answer 1

1. Right click on References under your solution.
2. Select Add Reference. The reference can be found under the Framework Assemblies list. Select System.DirectoryServices and click Add.