HistoryControl.xaml

<ListBox x:Name="HistoryList" ItemsSource="{Binding Path=History}">
    <i:Interaction.Triggers>
        <i:EventTrigger EventName="MouseDoubleClick">
            <i:InvokeCommandAction Command="{Binding Path=OpenCommand}" CommandParameter="{Binding Path=SelectedItem.Item2, ElementName=HistoryList}" />
        </i:EventTrigger>
    </i:Interaction.Triggers>
    <ListBox.ItemTemplate>
        <DataTemplate>
            <TextBlock Text="{Binding Path=Item1}" />
        </DataTemplate>
    </ListBox.ItemTemplate>
</ListBox>