error: missing method body, or declare abstract public boolean onCreateOptionsMenu(Menu Menu); code example

Example: User' does not contain a definition for 'Confirm Password' and no extension method 'Confirm Password' accepting a first argument of type 'User' could be found (are you missing a using directive or an assembly reference?)

User' does not contain a definition for 'ConfirmPassword' and no extension method 'ConfirmPassword' accepting a first argument of type 'User' could be found (are you missing a using directive or an assembly reference?)