3 comments on “SiteFinity 4 – Could not load file or assembly ‘Telerik.Web.UI, Version=2010.3.1109.40’

  1. I’ve had good success getting the lastest RadControls to work in Sitefinity 4.0. In fact, easier than 3.7.

    After creating a Sitefinity 4.0 project, I dropped the references and pointed to the new RADcontrols.

    The binding redirects work when you have dependencies under a DLL… that’s when it gets frustrating because you might not know what the dependency is. With few DLLs in Sitefinity 4.0, this problem is greatly reduced. This shows it’s ugly head when you have 3.7 code that you got from someone but there is no 4.0 equivalent yet.

  2. Starting with the upcoming 2011 Q1 release we’re planning to synchronize with the latest releases of RadControls. As a result, the Sitefinity 2011 Q1 release will be be staged for 2 weeks (or so) after the official release of the 2011 Q1 release of RadControls. This will give the Sitefinity team time to upgrade Sitefinity and work through all the regression testing.

    Telerik maintains a very aggressive release schedule (3 times a year with Service Packs in between). Our tools aren’t frozen in time for months at a time. Consequently, it’s very difficult for Sitefinity to stay in perfect unison with the latest releases of RadControls. We try as much as possible, but each upgrade requires substantial testing; this is not a trivial task. We deliberately plan these upgrades and allocate time for testing.

    In a nutshell, we’ll get better with the upcoming Q releases, but we’ll never be perfect. If you want to live on the bleeding edge, then you’ll need to create the Assembly Redirects you describe above and live with the potential problems this might create.

    Gabe Sumner
    Telerik | Sitefinity CMS

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