Could not load type ‘System.ServiceModel. Activation.HttpHandler’ from assembly ‘System.ServiceModel, version=3.0.0.0 Culture=neutral, PublicKeyToken= b77a5c561934e089

Yesterday I hat to configure a webservice, I stumbled into this error.
I fould and tried serveral solutions blogs.iis.net but none of them lead to a solution.Together with the guys from ADA ICT Devsquad’s Blog we found the solution.

Open your web.config and search for:
<system.serviceModel>
                               <serviceHostingEnvironment aspNetCompatibilityEnabled="true"/>
</system.serviceModel>

After switching this to false it works. More info about this parm! msdn.microsoft.com

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