An Accordion control contains a collection of AccordionItem objects. To expand an AccordionItem in an Accordion, set the IsExpanded property to true.

The AccordionItem is a HeaderedContentControl, which means that it can contain a single object of any type (such as a string, an image, or a panel) as a content and a single object of any type as a header.

System.Object
    System.Windows.Threading.DispatcherObject
        System.Windows.DependencyObject
            System.Windows.Media.Visual
                System.Windows.UIElement
                    System.Windows.FrameworkElement
                        System.Windows.Controls.Control
                            System.Windows.Controls.ContentControl
                                System.Windows.Controls.HeaderedContentControl
                                    MindFusion.UI.Wpf.AccordionItem

AccordionItem Members
MindFusion.UI.Wpf Namespace