The type or namespace 'Page' could not be found

Hello,

I have created Xamarin.Forms Portable blank app. In the PCL project, i have also added dll reference of Xamarin.Forms.Addin to resolve the error "Xamarin.Forms dll could not be found" error.

However, I am still getting an error "The type or namespace 'Page' could not be found".

Does anyone face this issue before? any solution to fix this issue?