Extending Castle DynamicProxy

<UserControl 
    x:Class="WPFUI.View.ProductsView"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:acb="clr-namespace:AttachedCommandBehavior;assembly=AttachedCommandBehavior"
    Style="{StaticResource ViewStyle}">
    <Grid>        
        <Grid.RowDefinitions>
            <RowDefinition Height="30"/>
            <RowDefinition/>
            <RowDefinition Height="30"/>
        </Grid.RowDefinitions>
        <Button 
            Grid.Row="0"
            HorizontalAlignment="Left"
            Content="Load Data"
            Command="{Binding Call}"
            CommandParameter="LoadData"
            />
        <ListView
            Grid.Row="1"
            Style="{StaticResource EntityCollectionViewListStyle}"
            ItemsSource="{Binding EntityCollection}"  
            >
            <ListView.View>
                <GridView>
                    <GridViewColumn
                        Header="Name"
                        DisplayMemberBinding="{Binding ProductName}"
                        Width="120"/>
                    <GridViewColumn
                        Header="Price"
                        DisplayMemberBinding="{Binding ProductPrice}"
                        Width="70"/>
                    <GridViewColumn
                        Header="Photo"
                        Width="50">
                        <GridViewColumn.CellTemplate>
                            <DataTemplate>
                                <Image 
                                    Source="{Binding ProductPhotography}" 
                                    Width="30" 
                                    Height="35"/>
                            </DataTemplate>
                        </GridViewColumn.CellTemplate>
                    </GridViewColumn>
                </GridView>
            </ListView.View>            
        </ListView>
        <Button 
            Grid.Row="2"
            HorizontalAlignment="Left"
            Content="Remove Selected"
            Command="{Binding Call}"
            CommandParameter="RemoveSelected"
            IsEnabled="{Binding CanRemove}"
            />
    </Grid>
</UserControl>