This work around did not work for me. I have a solution with several projects. One of them is a WPF application that uses a Telerik third party control for the DataGrid. Yesterday everything worked fine and this morning I came in to work and I get the error:
Error 3 Unknown build error, 'Cannot resolve dependency to assembly 'Telerik.Windows.Controls, Version=2009.3.1314.35, Culture=neutral, PublicKeyToken=5803cfa389c90ce7' because it has not been preloaded. When using the ReflectionOnly APIs, dependent assemblies must be pre-loaded or loaded on demand through the ReflectionOnlyAssemblyResolve event. Line 12 Position 10.' D:\Projects\RFID\Source\RFID\Client\RFID.Client.UI\View\IdleView.xaml 12 10 RFID.Client.UI
No checkouts or get latest was performed. Restarted VS2010 did not work.
In my case the work around was to add the Telerik.Windows.Controls assembly to the project references manually. This should have been done by the drag/drop of the Telerik control to the design surface but it did not. Other issues were reported on connect.microsoft.com explaining that assemblies with a 2nd degree of separation which are not normally required to be directly referenced are now needed in VS2010 for whatever reason.