WPF/MVVM Quick Start Tutorial

<Window x:Class="Example5.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:local="clr-namespace:Example5"
        Title="Example 5" Height="464" Width="530" >
    <Window.DataContext>
        <!-- Declaratively create an instance of our Album View Model-->
        <local:AlbumViewModel />
    </Window.DataContext>
    <Grid>
        <Grid.RowDefinitions>
            <RowDefinition Height="Auto" />
            <RowDefinition Height="Auto" />
            <RowDefinition Height="Auto" />
            <RowDefinition Height="Auto" />
        </Grid.RowDefinitions>
        <Grid.ColumnDefinitions>
            <ColumnDefinition Width="Auto" />
            <ColumnDefinition Width="Auto" />
        </Grid.ColumnDefinitions>
        <Menu Grid.Row="0" Grid.ColumnSpan="3">
            <MenuItem Header="Test">
                <MenuItem Header="Update Artist" Command="{Binding UpdateAlbumArtists}" />
            </MenuItem>
        </Menu>
        <Label Grid.Column="0" Grid.Row="1" Content="Example 5 - collection" />
        <Button Grid.Column="1" Grid.Row="1" Content="Add new artist" Command="{Binding AddAlbumArtist}" />
        <ListView Grid.Column="1" Grid.Row="2" ItemsSource="{Binding Songs}" >
            <ListView.ItemTemplate>
                <DataTemplate>
                    <StackPanel>
                        <Label Content="{Binding ArtistName}" />
                        <Label Content="{Binding SongTitle}" FontSize="10" />
                    </StackPanel>
                </DataTemplate>
            </ListView.ItemTemplate>
        </ListView>
        <Button Grid.Column="1" Grid.Row="3" Content="Update Artist Name" Command="{Binding UpdateAlbumArtists}" />
        <Label Content="Update doesn't work!" Grid.Row="2" />
    </Grid>
</Window>