Point old dll versions to newer versions in web.config

The following web.config entry was giving me an error stating it could not find the dll:

<add assembly="System.Web.Extensions.Design, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" />

The reason for it missing is because System.Web.Extensions.Design is now in the GAC with .NET 3.5 and it can not find version 1.0.61025.0.

To fix this I placed the following config entry which routes any old dll to the new dll:

<runtime>

<dependentAssembly>

<assemblyIdentity name="System.Web.Extensions.Design" publicKeyToken="31bf3856ad364e35"/>

<bindingRedirect oldVersion="1.0.0.0-1.1.0.0" newVersion="3.5.0.0"/>

dependentAssembly>

assemblyBinding>

runtime>

Make sure it is below the ConfigSections.