Represents the template of a view, along with it's supporting View-Model.
Inheritance: ModelBase, IViewTemplate
 /// <summary>Constructor.</summary>
 /// <param name="contentTemplate">The XAML template of the dialog content (see 'Content' property).</param>
 /// <param name="contentViewModel">The view-model for the content (see 'Content' property).</param>
 public AcceptCancelDialogViewModel(DataTemplate contentTemplate, INotifyPropertyChanged contentViewModel) 
 {
     // Store the presenter (use the given view-model if it happens to be a presenter).
     var modelAsPresenter = contentViewModel as IAcceptCancelPresenter;
     AcceptCancelPresenter = modelAsPresenter ?? new AcceptCancelPresenterEmbeddedViewModel();
     
     // Store content.
     Content = new ViewTemplate(contentTemplate, contentViewModel);
 }
        /// <summary>Constructor.</summary>
        public DialogContent()
        {
            // Setup initial conditions.
            Content = new ViewTemplate { ViewModel = this };

            // Wire up events.
            propertyObserver = new PropertyObserver<DialogContent>(this)
                .RegisterHandler(m => m.Width, m => SyncSizeOnParent())
                .RegisterHandler(m => m.Height, m => SyncSizeOnParent());

            contentPropertyObserver = new PropertyObserver<IViewTemplate>(Content)
                .RegisterHandler(m => m.Template, m => SyncTemplateOnParent());
        }