'S#arp Architecture WCF Gotcha'

We’ve recently adopted the excellent S#arp Architecture for our projects. I highly recommend taking a look at the project site.

On Friday I created a simple WCF service using S#arp’s Northwind sample site for  reference.

Using WcfTestClient I located my service and attempted to test one of the methods, only to get the following error.

I looked for the usual suspects (rogue entries in the GAC, searching the c: drive for instances of Castle.Windsor) but couldn’t find the problem.

Eventually I discovered this code in the sample site’s web.config.

<runtime>
  <assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
    <dependentAssembly>
        <assemblyIdentity name="Castle.Windsor" publicKeyToken="407dd0808d44fbdc" culture="neutral"/>
        <bindingRedirect oldVersion="0.0.0.0-65535.65535.65535.65535" newVersion="2.0.0.0"/>
    </dependentAssembly>
  </assemblyBinding>
</runtime>

Copying this to the web.config for my WCF service solved the problem.