С точки зрения синтаксиса XNA правильным будет выражение

using System;using System.Collections.Generic;using System.Linq;using System.Net;using System.Windows;using System.Windows.Controls;using System.Windows.Documents;using System.Windows.Input;using System.Windows.Media;using System.Windows.Media.Animation;using System.Windows.Shapes;using Microsoft.Phone.Controls;namespace Lecture_9_1{    public partial class MainPage : PhoneApplicationPage    {        Random rand = new Random();        int numTaps = 0;        public MainPage()        {            UpdatePageTitle(numTaps);        }        protected override void OnManipulationStarted(ManipulationStartedEventArgs args)        {            UpdatePageTitle(++numTaps);            args.Complete();            base.OnManipulationStarted(args);        }        void UpdatePageTitle(int numTaps)        {            string[] picture = new string[] { "Москва", "Париж", "Уфа", "Токио", "Нью-Йорк",             "Рим", "Мадрид", "Хельсинки", "Вена", "Улан-Батор" };            int n = picture.Length - 1;            string str = picture[rand.Next(n)];            ApplicationTitle.Text = "Случайный город ... " + str;            PageTitle.Text = String.Format("Вы нажали {0} раз(а)", numTaps);        }    }}      

using System;using System.Collections.Generic;using System.Linq;using System.Net;using System.Windows;using System.Windows.Controls;using System.Windows.Documents;using System.Windows.Input;using System.Windows.Media;using System.Windows.Media.Animation;using System.Windows.Shapes;using Microsoft.Phone.Controls;namespace Lecture_9_1{    public  class MainPage : PhoneApplicationPage    {        Random rand = new Random();        int numTaps = 0;        public MainPage()        {            InitializeComponent();            UpdatePageTitle(numTaps);        }        protected override void OnManipulationStarted(ManipulationStartedEventArgs args)        {            UpdatePageTitle(++numTaps);            args.Complete();            base.OnManipulationStarted(args);        }        void UpdatePageTitle(int numTaps)        {            string[] picture = new string[] { "Москва", "Париж", "Уфа", "Токио", "Нью-Йорк",             "Рим", "Мадрид", "Хельсинки", "Вена", "Улан-Батор" };            int n = picture.Length - 1;            string str = picture[rand.Next(n)];            ApplicationTitle.Text = "Случайный город ... " + str;            PageTitle.Text = String.Format("Вы нажали {0} раз(а)", numTaps);        }    }}      

using System;using System.Collections.Generic;using System.Linq;using System.Net;using System.Windows;using System.Windows.Controls;using System.Windows.Documents;using System.Windows.Input;using System.Windows.Media;using System.Windows.Media.Animation;using System.Windows.Shapes;namespace Lecture_9_1{    public partial class MainPage : PhoneApplicationPage    {        Random rand = new Random();        int numTaps = 0;        public MainPage()        {            InitializeComponent();            UpdatePageTitle(numTaps);        }        protected override void OnManipulationStarted(ManipulationStartedEventArgs args)        {            UpdatePageTitle(++numTaps);            args.Complete();            base.OnManipulationStarted(args);        }        void UpdatePageTitle(int numTaps)        {            string[] picture = new string[] { "Москва", "Париж", "Уфа", "Токио", "Нью-Йорк",             "Рим", "Мадрид", "Хельсинки", "Вена", "Улан-Батор" };            int n = picture.Length - 1;            string str = picture[rand.Next(n)];            ApplicationTitle.Text = "Случайный город ... " + str;            PageTitle.Text = String.Format("Вы нажали {0} раз(а)", numTaps);        }    }}      

using System;using System.Collections.Generic;using System.Linq;using System.Net;using System.Windows;using System.Windows.Controls;using System.Windows.Documents;using System.Windows.Input;using System.Windows.Media;using System.Windows.Media.Animation;using System.Windows.Shapes;using Microsoft.Phone.Controls;namespace Lecture_9_1{    public partial class MainPage : PhoneApplicationPage    {        Random rand = new Random();        int numTaps = 0;        public MainPage()        {            InitializeComponent();            UpdatePageTitle(numTaps);        }        protected override class OnManipulationStarted(ManipulationStartedEventArgs args)        {            UpdatePageTitle(++numTaps);            args.Complete();            base.OnManipulationStarted(args);        }        void UpdatePageTitle(int numTaps)        {            string[] picture = new string[] { "Москва", "Париж", "Уфа", "Токио", "Нью-Йорк",             "Рим", "Мадрид", "Хельсинки", "Вена", "Улан-Батор" };            int n = picture.Length - 1;            string str = picture[rand.Next(n)];            ApplicationTitle.Text = "Случайный город ... " + str;            PageTitle.Text = String.Format("Вы нажали {0} раз(а)", numTaps);        }    }}