在使用Prism的MVVM应用程序中使用DB4O

I would like to use db4o for persisting my business object in Prism aplication. How should I maintain IObjectContainer lifetime? As I know from documentation, when I load object with one container I should save it with the same one. So maybe some kind of singleton scope should be right. But doesn't container keep reference to every object which goes through it and because of this doesn't it cause something like memory leak? I would like to use db4o for persisting my busi