SearchBar forms problem

Hi All

I'm trying to add a SearchBar object (programmatically) to my content page in xamarin.forms. It works perfectly well in iOS, but when i run the app in android i get the error below when i start debugging (it looks to compile absolutely fine), any ideas?

Many Thanks

Stuart

"no method with name='setInputType' signature='(I)V' in class Landroid/widget/SearchView;"