Initial Expand State

By default, the C1Expander.IsExpanded property is set to False, which means that the control appears in its collapsed state when the page is loaded. If you want the control to be expanded upon page load, you can set the IsExpanded property to True .

The following table illustrates the difference between the two expand states.

IsExpanded	Result
IsExpanded=False
IsExpanded=True

You can set the expand states in Blend, XAML, or code.