<ListBox
Grid.Row="2"
Margin="1,0,-1,0"
ItemsSource="{Binding Reminders, UpdateSourceTrigger=PropertyChanged}"
SelectedItem="{Binding SelectedReminder, Mode=TwoWay}"
framework:ControlItemDoubleClickAttachedProperty.ItemsDoubleClick="True">
<ListBox.InputBindings>
<MouseBinding MouseAction="LeftDoubleClick" Command="{Binding EditReminder}"/>
</ListBox.InputBindings>