wpf databinding in usercontrol doesn't work

<Window x:Class="testwpfgrid.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        Title="MainWindow" Height="350" Width="525"
        DataContext="{Binding RelativeSource={RelativeSource Self}}">
    
    <StackPanel>
        <ListView Name="lv" ItemsSource="{Binding Path=AvosEntries}" IsSynchronizedWithCurrentItem="True">
            <ListView.View>
                <GridView AllowsColumnReorder="true" ColumnHeaderToolTip="Avos Information">
                    <GridViewColumn DisplayMemberBinding="{Binding Path=AvosName}" Header="Avos Name" Width="100"/>
                </GridView>
            </ListView.View>
        </ListView>
        <Button HorizontalAlignment="Right" Margin="5,5,5,5" Content="Add Row" Click="AddRow_Click" />
    </StackPanel>
</Window>

public partial class MainWindow : Window
   {
       public class AvosEntry
       {
           public string AvosName { get; set; }
       }
       public MainWindow()
       {
           AvosEntries = new ObservableCollection<AvosEntry>();
           fillList();
           InitializeComponent();
       }

       private void AddRow_Click(object sender, RoutedEventArgs e)
       {
           AvosEntries.Add(new AvosEntry
           {
               AvosName = "New Avos Entry"
           });
       }

       private void fillList()
       {
           for (int i = 1; i <= 10; i++)
           {
               AvosEntry avosEntry = new AvosEntry();
               avosEntry.AvosName = "Avos " + i;

               AvosEntries.Add(avosEntry);
           }
       }

       public ObservableCollection<AvosEntry> AvosEntries { get; private set; }
   }

<UserControl x:Class="Genesyslab.Desktop.Modules.Extension.avos.MySample.MySampleView"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">

    <StackPanel>
        <ListView Name="lv" ItemsSource="{Binding Path=AvosEntries}" Foreground="#FFEF1212" removed="#FF868686" IsSynchronizedWithCurrentItem="True">
            <ListView.View>
                <GridView AllowsColumnReorder="true" ColumnHeaderToolTip="Avos Information">
                    <GridViewColumn DisplayMemberBinding="{Binding Path=AvosName}" Header="Avos Name" Width="100"/>
                </GridView>
            </ListView.View>
        </ListView>
        <Button HorizontalAlignment="Right" Margin="5,5,5,5" Content="Add Row" Click="AddRow_Click" />
    </StackPanel>
</UserControl>

public partial class MySampleView : UserControl
{
    public MySampleView()
    {
        AvosEntries = new ObservableCollection<AvosEntry>();
        fillList();
        InitializeComponent();
        Width = Double.NaN;
        Height = Double.NaN;
        lv.DataContext = AvosEntries;

    }

    private void AddRow_Click(object sender, RoutedEventArgs e)
    {
       AvosEntries.Add(new AvosEntry
        {
            AvosName = "New Avos Entry"
        });
    }


    private void fillList()
    {
        for (int i = 1; i <= 10; i++)
        {
            AvosEntry avosEntry = new AvosEntry();
            avosEntry.AvosName = "Avos " + i;

            AvosEntries.Add(avosEntry);
        }
    }

    public ObservableCollection<AvosEntry> AvosEntries
    {
        get { return (ObservableCollection<AvosEntry>)GetValue(AvosEntriesProperty); }
        set { SetValue(AvosEntriesProperty, value); }
    }

    public static DependencyProperty AvosEntriesProperty = DependencyProperty.Register("AvosEntries",
 typeof(ObservableCollection<AvosEntry>),
 typeof(MySampleView),
 new PropertyMetadata(new ObservableCollection<AvosEntry>()));