The other day while working on a Silverlight application I received the following error:
“Parser internal error: Object writer ‘xClassNotDerivedFromElement’. [Line: N Position: N]
at System.Windows.Application.LoadComponent(Object component, Uri resourceLocator)”
When calling the InitializeComponent() internal method on a custom user control.
So I did what I did best and searched Google for the answer, and while I didn’t end up finding my solution there I did find more about what can cause this error to occur.