Wywołanie eventu z ResourceDictionary

Nie będę się rozpisywał:

ResourceDictionary:

    <DataTemplate x:Key="imagesItemTemplate">
        <Grid Margin="1" Background="#F8F8F8">
            <Grid.RowDefinitions>
                <RowDefinition Height="80" />
                <RowDefinition Height="Auto" />
            </Grid.RowDefinitions>

            <Image Grid.Row="0" Source="{Binding Path=Image}"/>
            <Label Grid.Row="1" Content="{Binding Path=Title}"  HorizontalAlignment="Center"/>

            <Grid.ContextMenu>
                <ContextMenu>
                    <MenuItem Header="Kopiuj"></MenuItem> //tutaj
                </ContextMenu>
            </Grid.ContextMenu>
        </Grid>
    </DataTemplate>

Window:

<ListBox x:Name="screenListBox" Grid.Row="3" ItemsSource="{Binding Path= Images, ElementName=x}" ItemTemplate="{StaticResource imagesItemTemplate}"/>

Jak do MenuItem w ContextMenu dodać event? (Click)