While trying to compile a Silverlight project for Windows Phone using Visual Studio 2010 I received this (attached) odd error:
The “CreateSilverlightAppManifest” task was not given a value for the
required parameter “SilverlightRuntimeVersion”
If I double click it nothing happens, no file is open. Google is not my friend on this one 🙂 Did anyone also encountered this error and found a solution?
I mention that:
- I have some experience in C#/XAML/WPF/VS2010, but no Silverlight/Windows Phone specific knowledge;
- I have installed Silverlight 4 SDK and Windows Phone Toolkit.

I didn’t find a solution for this problem, so I have taken advantage of this “opportunity” to re-install my entire OS and development tools 🙂 The problem didn’t occur after this couple-of-hours process.