public MenuMasterPage(MasterDetailMainPage masterDetail)
        {
            masterDetailPage = masterDetail;

            InitializeComponent();

            this.Title = "Menu Master Page";

            this.ButtonPagesNavigationA.BackgroundColor = FirstPageOfNavigationA.PageColor;
            this.ButtonPagesNavigationB.BackgroundColor = FirstPageOfNavigationB.PageColor;

            this.ButtonPagesNavigationA.Clicked += ButtonPagesNavigationA_Clicked;
            this.ButtonPagesNavigationB.Clicked += ButtonPagesNavigationB_Clicked;
        }
 public App()
 {
     // The root page of your application
     MainPage = new MasterDetailMainPage();
 }