With WPF Prism can you prevent two modules from trying to use the same region simultaneously?

Here is the overview of what I am trying to do. I have a region in the shell that is used for application modal dialogs. When a module wants to launch an application modal dialog it loads a custom Lightbox control into the region and fills it with the content I want to display (warning, wizards, etc). I have the region defined in the shell because I assume it needs to be there for the lightbox background to block out the whole window.

The immediate situation th开发者_开发知识库at comes to mind is what happens if two modules trying to use the region at the same time, is there any prismy way of preventing another module from accessing a region until after the current use of the region is finished?

If there are better ways to accomplish what I want I am open to suggestions.

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You could use the RegionPopupBehavior from the Prism RI to display dialogs and have the dialog's content set as views into regions.

You can read more about that here: http://compositewpf.codeplex.com/Thread/View.aspx?ThreadId=65394.

I hope this helps.

Thanks, Damian