# Expanding and Collapsing C1Expander

## Content



There are several options for customizing the way that the [C1Expander](/componentone/api/wpf/online-extended/dotnet-framework-api/C1.WPF.Extended.4.6.2/C1.WPF.Extended.C1Expander.html) control expands and collapses. The following sections describe how to set the initial expand state, set the direction to which the control expands, and how to prevent a **C1Expander** control from expanding.