WPF Menu using ViewModel - Part 1

using System;
using System.Collections.Generic;
using System.Configuration;
using System.Data;
using System.Linq;
using System.Windows;
using MenuViewModel;
using MenuBusinessObjects;

namespace MenuItemViewModelSample
{
    /// <summary>
    /// Interaction logic for App.xaml
    /// </summary>
    public partial class App : Application
    {
        protected override void OnStartup(StartupEventArgs e)
        {
            Twenty20Teams twenty20Teams = new Twenty20Teams();
            twenty20Teams.Teams = new List<Team>();

            Team teamA = new Team() { TeamName = "Team A"};
            teamA.Players = new List<Player>();

            Player player1 = new Player(teamA) { PlayerName = "Player A" };
            teamA.Players.Add(player1);
            Player player2 = new Player(teamA) { PlayerName = "Player B" };
            teamA.Players.Add(player2);
            Player player3 = new Player(teamA) { PlayerName = "Player C" };
            teamA.Players.Add(player3);

            Team teamB = new Team() { TeamName = "Team B" };
            teamB.Players = new List<Player>();

            Player player4 = new Player(teamB) { PlayerName = "Player D" };
            teamB.Players.Add(player4);
            Player player5 = new Player(teamB) { PlayerName = "Player E" };
            teamB.Players.Add(player5);
            Player player6 = new Player(teamB) { PlayerName = "Player F" };
            teamB.Players.Add(player6);

            twenty20Teams.Teams.Add(teamA);
            twenty20Teams.Teams.Add(teamB);

            Twenty20TeamsViewModel viewModel = new Twenty20TeamsViewModel(twenty20Teams);
            viewModel.Header = "Twenty 20 Teams";
            MenuSampleWindow sampleWindow = new MenuSampleWindow(viewModel);
            sampleWindow.Show();
        }
    }
}