C1TreeView allows you to fully customize the control's appearance using CSS selectors. This topic will walk you through setting CSS selectors to customize the appearance of C1TreeView.

1. Begin in Design View and navigate to the Properties window for your C1TreeView control.
2. Locate the CssClass property and use the drop-down menu to set it to wijmo-wijtree.
3. Switch to your Source View and locate the first set of <asp:Content> tags on the page. Add <style type="text/css"></style> tags. These tags will allow you to add CSS styling.
4. Add .wijmo-wijtree { color: #993377;  background: #02222;  border-color: Black; font-family: Elephant; } to the tags.
5. Run your program. The C1TreeView control should appear as in the following image.