Simple example of Custom Dialog without MVVM

[Montago]

I've been sitting here for the past 2 hours trying to figure out how to show the in-app modal dialog.

The MahApps.Metro.Demo has some VERY convoluted and very hard to transfer examples of how to construct dialogs (why are they so?) - the MahApps.Metro.Demo codebase contains a ton of ExtensionMethods which only makes it even harder to figure out how they work.,......

The Documentation is almost non-existing : https://mahapps.com/docs/dialogs/login-dialogs
where only the MVVM contains SOME descriptions.

And when trying to use the DialogCoordinator you also end up in a very consoluted situation where the Singleton needs a reference to the DataContext or viceverse - Waaaaaat (o_O)

Preferably it would be nice to do something like this:

DialogService.ShowDialog( "titel", "text", Buttons.OkCancel)
DialogService.ShowDialog( new CustomUserControlInstance(), Buttons.OkCancel)

Why is this so hard ?

Simple Question:
How do i present a Dialog that contains my own UserControl - that has an OK and Cancel button ?