Microsoft.Phone.Controls.ListPicker.OpenPickerPage C# (CSharp) Method

        private void OpenPickerPage()
        {
            if (null == PickerPageUri)
            {
                throw new ArgumentException("PickerPageUri");
            }

            if (null == _frame)
            {
                // Hook up to necessary events and navigate
                _frame = Application.Current.RootVisual as PhoneApplicationFrame;
                if (null != _frame)
                {
                    _frameContentWhenOpened = _frame.Content;

                    // Save and clear host page transitions for the upcoming "popup" navigation
                    UIElement frameContentWhenOpenedAsUIElement = _frameContentWhenOpened as UIElement;

                    if (null != frameContentWhenOpenedAsUIElement)
                    {
                        _savedNavigationInTransition = TransitionService.GetNavigationInTransition(frameContentWhenOpenedAsUIElement);
                        TransitionService.SetNavigationInTransition(frameContentWhenOpenedAsUIElement, null);
                        _savedNavigationOutTransition = TransitionService.GetNavigationOutTransition(frameContentWhenOpenedAsUIElement);
                        TransitionService.SetNavigationOutTransition(frameContentWhenOpenedAsUIElement, null);

                    }

                    _frame.Navigated += OnFrameNavigated;
                    _frame.NavigationStopped += OnFrameNavigationStoppedOrFailed;
                    _frame.NavigationFailed += OnFrameNavigationStoppedOrFailed;

                    _hasPickerPageOpen = true;

                    _frame.Navigate(PickerPageUri);
                }
            }
        }