我处理Closing事件，而不是处理Closed事件(可能会丢失对基础视图的引用).

Instead of handling the Closed event (which may have lost a reference to the underlying view), I handle the Closing event.

这可行，但是，当我尝试重新打开选项卡时，它显示的是同一实例.阅读此内容后，在复合WPF中 (Prism)，IRegion.Add和IRegionManager.RegisterViewWithRegion有什么区别?我对此进行了更改:

This worked, however, when I tried to re-open the tab, it was displaying the same instance. After reading this In Composite WPF (Prism), what is the difference between IRegion.Add and IRegionManager.RegisterViewWithRegion? I changed this:

_regionManager.RegisterViewWithRegion("MainRegion", typeof(Views.ClassicFrontierView));

对此:

_regionManager.Regions["MainRegion"].Add(new Classic.Views.ClassicFrontierView());

我仍然必须对Prism/avalondock进行一些研究，以确保不会出现内存泄漏，但到目前为止，它似乎仍在工作.

I still have to do some research with Prism / avalondock to make sure there will be no memory leaks, but as of now it appears to be working.