* ContactAdapter.cs:
  get Context , events handler Method from Iextra parm
remove delgate and event. 

* MainAdapter.cs:
  Remove AddressBook Xamrina

* Pagerad2.cs:
  (Revert to revision 60c9d065db6fd3e8cd400c628c1c750106c29778)

* PrepFragment.cs:
  (Revert to revision 35376f4db7f18fe6da77a75d57e94e64074a5051)