# Working with the C1Expander Control

## Content



The [C1Expander](/componentone/api/wpf/online-extended/dotnet-framework-api/C1.WPF.Extended.4.6.2/C1.WPF.Extended.C1Expander.html) control is a header content control that provides an expandable and collapsible pane for storing text, images, and controls. When you add the **C1Expander** control to a project, it exists as a header with a blank content area. By default, the control's interface looks similar to the following image:

**![](https://cdn.mescius.io/document-site-files/images/babf1807-69aa-4d8a-96b6-d6c6d9325368/silverlightdocuments/documents/graphics/c1expander/narrative/defaultexpander.png)**

After the **C1Expander** control is added to your project, you can add a header and content to the control. You can also modify behaviors, such as the expandability and the direction, of the control. The following topics provide an overview of the **C1Expander** control's elements and features.

## See Also

[C1Expander Elements](/componentone/docs/wpf/online-extended/Expander/ExpanderFeatures/WorkingwiththeC1ExpanderControl/C1ExpanderElements)

[Expander Header](/componentone/docs/wpf/online-extended/Expander/ExpanderFeatures/WorkingwiththeC1ExpanderControl/ExpanderHeader)

[Expander Content Area](/componentone/docs/wpf/online-extended/Expander/ExpanderFeatures/WorkingwiththeC1ExpanderControl/ExpanderContentArea)

[Expanding and Collapsing C1Expander](/componentone/docs/wpf/online-extended/Expander/ExpanderFeatures/WorkingwiththeC1ExpanderControl/ExpandingandCollapsingC1Expander)

[Initial Expand State](/componentone/docs/wpf/online-extended/Expander/ExpanderFeatures/WorkingwiththeC1ExpanderControl/InitialExpandState)

[Expand Direction](/componentone/docs/wpf/online-extended/Expander/ExpanderFeatures/WorkingwiththeC1ExpanderControl/ExpandDirection2)

[Expandability](/componentone/docs/wpf/online-extended/Expander/ExpanderFeatures/WorkingwiththeC1ExpanderControl/Expandability)