Create a new Forms project, show the Previewer, and change the Class attribute of one of the XAML pages to something bogus.
You see the error message
"The base class associated with this Xaml file could be be found. Please double check the class referenced in the `Class` attribute exists, and that the project has been complied."
I spotted a few minor grammar/style/punctuation issues with this message, including that the Class single quotes are backwards. Let's change it to:
"The base class associated with this XAML file could be be found. Please double check that the class referenced in the 'Class' attribute exists and the project has been complied."
Also, let's check the other error messages to see how XAML is capitalized. I saw at least one where it was "xaml". Let's make it consistently "XAML".
Bret is this something you can fix? Where is this error generated from?