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Resolving "Could not load type Microsoft.ApplicationServer.Caching.DataCacheSessionStoreProvider"

Mon, 08/02/2010 - 13:27 |  Robert MacLean

If you are using AppFabric and decide to swop out the ASP.NET standard caching with it you may run into the error:

Could not load type "Microsoft.ApplicationServer.Caching.DataCacheSessionStoreProvider”

The error will be pointing to the type of the custom session (line 5 below):

<sessionState mode="Custom" customProvider="AppFabricCacheSessionStoreProvider">
    <providers>
        <!-- specify the named cache for session data -->
        <add name="AppFabricCacheSessionStoreProvider" 
             type="Microsoft.ApplicationServer.Caching.DataCacheSessionStoreProvider" 
             cacheName="TailSpin" sharedId="TailSpinTravelId"/>
    </providers>
</sessionState>

The cause is that the application can’t find that class. To help it find it you need to add the following to the Configuration –> System.Web –> Compilation –> Assemblies:

<add assembly="Microsoft.ApplicationServer.Caching.Client, Version=1.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35"/>
<add assembly="Microsoft.ApplicationServer.Caching.Core, Version=1.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35"/>
Tags: .NET, Annoyances, Development, Tools & Apps

Thanks! This helped me also.

Submitted by Richard Beauchamp on Tue, 12/28/2010 - 19:48.

Excellent. This saved me some diagnosis. Thanks.

Submitted by Robin M on Fri, 12/17/2010 - 16:19.

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