How to check if a view already added to a region in prism?

@aniya.jaskolski 

In Prism, you can check if a view has already been added to a region by using the Region's Views property. Here's how you can do it:

1. Get the region manager and the region where the view is added:

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IRegionManager regionManager = container.Resolve<IRegionManager>();
IRegion region = regionManager.Regions["YourRegionName"];

1. Check if the view is already in the region:

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bool isViewAdded = region.Views.Contains(viewInstance);

This will return true if the view is already added to the region, otherwise it will return false.

You can use this check to prevent adding the same view multiple times to a region or to perform some logic based on whether the view is already present in the region or not.