What is the different between IDialogService and IRegionDialogService?

[Chorusapp]

Hi.

I watched Brian's course on Pluralsight, Introduction to Prism for WPF.
And, I am watching his stream on Youtube, Prism for WPF - Building Outlook nowadays.

He uses IDialogService interface on Pluralsight's course but, uses IRegionDialogService inteface on Youtube.

It is really confusing.

I I want to know what is the difference between them.

[brianlagunas]

The IDialogService interface is part of Prism and is used for showing basic dialogs. The IRegionDialogService is a custom interface I wrote specifically for the app I was building in the YouTube video that handled region navigation within dialogs.

[Chorusapp]

Thanks to you, I got to understand.