How to use invokationCommandAction with MVVM Light v5? - mvvm

Question

I have a project which target is .NET 4.5.1. I install the MVVM Light nuget, and the manager install the version 5 of MVVM Light.
In this version I can't use EventToCommand, I have to use incovationCommandAction, so I need to add th my axml this code in the header:
xmlns:interactivity="using:Microsoft.Xaml.Interactivity"
xmlns:core="using:Microsoft.Xaml.Interactions.Core"
and this code to add a command to my control:
<interactivity:Interaction.Behaviors>
<core:EventTriggerBehavior EventName="PointerPressed">
<core:InvokeCommandAction
Command="{Binding ShowPositionCommand, Mode=OneWay}"
InputConverter="{StaticResource MouseButtonEventArgsToPointConverter}"
InputConverterParameter="{Binding ElementName=LayoutRoot}" />
</core:EventTriggerBehavior>
</interactivity:Interaction.Behaviors>
However, I get an error that say core:EventTriggerBehavior is not available in Microsoft.Xaml.Interactions.Core.
Which is the problem? the example I get it from this link
Is it possible to use MVVM Light v4.3 in a project which target is 4.5.1?
Thanks.

Answer 1

For event triggers i'm using the following code - let me know if this helps you out.
(this is using MVVM Light version 5, targeting .NET 4.5)
xmlns:j="clr-namespace:System.Windows.Interactivity;assembly=System.Windows.Interactivity"
<j:Interaction.Triggers>
<j:EventTrigger EventName="PreviewKeyDown">
<cmd:EventToCommand Command="{Binding SomeCommand}">
</cmd:EventToCommand>
</j:EventTrigger>
</j:Interaction.Triggers>