Interactive toast notifications with Silverlight and Runtime 8.1 apps

Background.cs

using System;
using Windows.ApplicationModel.Background;
using Windows.Foundation.Collections;
using Windows.Foundation.Metadata;

namespace TestInteractive.Tasks
{
    public sealed class InteractiveTask : IBackgroundTask
    {
        public void Run(IBackgroundTaskInstance taskInstance)
        {
            var details = taskInstance.TriggerDetails as IToastNotificationActionTriggerDetail;
        }
    }

    [Guid(2487554906, 14579, 17142, 150, 170, 121, 85, 176, 240, 61, 162)]
    public interface IToastNotificationActionTriggerDetail
    {
        string Argument { get; }

        ValueSet UserInput { get; }
    }
}

Foreground.cs

var type = typeof(IBackgroundTrigger).Assembly.GetType("Windows.ApplicationModel.Background.ToastNotificationActionTrigger");
if (type != null)
{
    var trigger = (IBackgroundTrigger)Activator.CreateInstance(type);
    var builder = new BackgroundTaskBuilder();
    builder.Name = "InteractiveTask";
    builder.TaskEntryPoint = "TestInteractive.Tasks.InteractiveTask";
    builder.SetTrigger(trigger);
    builder.Register();
}