public Frame()
{
var backStack = new ObservableCollection <PageStackEntry>();
var forwardStack = new ObservableCollection <PageStackEntry>();
backStack.CollectionChanged += (s, e) => CanGoBack = BackStack.Any();
forwardStack.CollectionChanged += (s, e) => CanGoForward = ForwardStack.Any();
BackStack = backStack;
ForwardStack = forwardStack;
}
public Frame()
{
var backStack = new ObservableCollection <PageStackEntry>();
var forwardStack = new ObservableCollection <PageStackEntry>();
backStack.CollectionChanged += (s, e) =>
{
CanGoBack = BackStack.Any();
BackStackDepth = BackStack.Count;
};
forwardStack.CollectionChanged += (s, e) => CanGoForward = ForwardStack.Any();
BackStack = backStack;
ForwardStack = forwardStack;
DefaultStyleKey = typeof(Frame);
}