Prism IEventAggregator Generic subscription service

EventSubscriberService

using System;
using System.Collections.Generic;
using TestApp.Interfaces;
using Microsoft.Practices.Prism.PubSubEvents;

namespace TestApp.Services
{
    public class EventSubscriberService : IEventSubscriberService, IDisposable
    {
        private readonly IEventAggregator m_eventAggregator;
        private Dictionary<SubscriptionToken, Type> m_subscriptions;

        public EventSubscriberService(IEventAggregator eventAggregator)
        {
            m_eventAggregator = eventAggregator;

            m_subscriptions = new Dictionary<SubscriptionToken, Type>();
        }

        public void Subscribe<T, U>(string moduleName, Action<U> eventAction, ThreadOption threadOption) where T : PubSubEvent<U>, new()
        {
            var subscriptionToken = m_eventAggregator.GetEvent<T>().Subscribe(eventAction, threadOption, true);

            m_subscriptions.Add(subscriptionToken, typeof(T));
        }

        public void Dispose()
        {
            foreach (var item in m_subscriptions)
            {
              //Do Something
            }
        }
    }
}

IEventSubscriberService

using System;
using Microsoft.Practices.Prism.PubSubEvents;

namespace TestApp.Interfaces
{
    public interface IEventSubscriberService
    {
        void Subscribe<T, U>(string moduleName, Action<U> eventAction, ThreadOption threadOption) where T : PubSubEvent<U>, new();
    }
}