Hidding ActionBar

Hello

Inside my App.cs I have:

var register = new RegisterPage();
            register.ActionBar.Hide(); // I can't access this object
            register.SupportActionBar.Hide();// I can't access this object
            return new NavigationPage(register);

Neither

namespace Forms_Example
    {
        class RegisterPage : ContentPage
        {
        this.ActionBar.Hide();
            public RegisterPage()
            {...