EntranceTransition and Prism

[cassionandi]

Using EntranceTransition, when I call a Dialog with Prism, the animation starts again on the background page. When I close the Dialog, the animation runs again on the page.

`var b = new EntranceTransition
{
Duration = "300"
};

        mainGrid.Behaviors.Add(b);`

dialogService.ShowDialog("NovidadesView", CloseDialogCallback);

How can I stop this from happening? I tried to track down the "Renderer" property changed on my page, removing the Behavior, but it seems to be spread to all components inside the mainGrid.