Silverlight 4 OOB White Screen of Death. Failed to load pre-requisites for the application

I'm developing a SL4 OOB application that has suddenly started giving me the white screen of death.

If I try to run it 'in-browser' and check the console I can see the error 2105 : 'Failed to load pre-requisites for the application' but there's very little info about it anywhere.

None of my breakpoints get hit. Even starting the app with F11 (step into) doesn't get me anywhere.

I can run other Silverlight projects just fine开发者_运维百科 so it's not the runtime. I've even copied the source into another project to see if that might help but to no avail.

Does anyone have any ideas how I might get started fixing this?

I have seen this myself and it was a pain..

What I had to do was a system restore, de-installed all traces of Silverlight and Blend and then reinstalled them all. However I had also just installed Silverlight 5 RC which didn't play nicely with Telerik and might have been the problem.

There is also some information about this error here:

http://connect.microsoft.com/VisualStudio/feedback/details/530074/unhandled-error-in-silverlight-application-2105-when-building-as-an-x86-configuration.

Is this your problem?

Damn it, I hate answering my own questions but the problem was quite obscure.

Somehow, I managed to get a regular .Net reference in my Silverlight project through a Nuget package. That was it.

DOH!