Small Gotcha in .NET Framework 3.5 Beta 2 to RTM Upgrade

Visual Studio 2008 was officially released today to MSDN subscribers so I took the leap and did the upgrade. I ran into an issue with a simple fix that I thought everyone should be aware of. You'll get an error message stating: "Could not load file or assembly 'System.Data.DataSetExtensions, Version=2.0.0.0...". This is somewhat cryptic, but easy to fix.

If you have a web project that was running under .NET 3.5 beta 2 you will have an assembly reference as follows:

<compilation>
<assemblies>
  ...
  <add assembly="System.Data.DataSetExtensions, Version=2.0.0.0, Culture=neutral, PublicKeyToken=B77A5C561934E089"/>
</assemblies>
</compilation>

Notice the version number is 2.0.0.0. This was apparently changed at the RTM and the version number should be 3.5.0.0 like:

<compilation>
<assemblies>
  ...
  <add assembly="System.Data.DataSetExtensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=B77A5C561934E089"/>
</assemblies>
</compilation>