Always see NullReference exception in designer with all silverlight business applications in visual studio 2010

Question

Starting with the most simple case.

If I press \"File->new project->silverlight business application\" it opens up to MainPage.xaml saying the message attached at the bo

Answer 1

it might be because of your application is developed on Silverlight 5 and you are opening it with the machine having silverlight 4. i am just giving example of 5 and 4. or might be you have not installed the SDK pack of it.