Broadcasts the update to all connected clients using SignalR. I've done this within the controller to demonstrate server -> client pushing.

BroadcastUpdate.cs

/// <summary>
/// Broadcasts the update to all connected clients. I've done this directly in the controller to 
/// demonstrate server -> client pushing, rather than client -> client pushing.
/// </summary>
/// <param name="updateItem">The update item.</param>
internal static void BroadcastUpdate(Update updateItem) 
{
    // Fetch the hub's context to broadcast
    IHubContext context = GlobalHost.ConnectionManager.GetHubContext<LiveUpdate.Hubs.LiveUpdateHub>();

    // Call the hub's feedUpdated method with our news / event item.
    context.Clients.feedUpdated(updateItem);
}