Each tab on the C1TabControl control is represented by the C1TabItem class. The header of the tab is exposed by the Header property of the C1TabItem. Each tab is associated with a tab page (see Tab Page).
Tabs can appear rounded, sloped, or rectangular. When a tab is added to a page, its default appearance is sloped – it looks similar to a tab on an office folder.
You can add a close button to each tab by setting the TabItemClose property to InEachTab. This will allow users to close any tab in the control; however, you can deny users the ability to close a particular tab by setting that tab's CanUserClose property to False.
Customizing the Header
When you want to add something simple to the tab's header, such as an unformatted string, you can simply use the common XML attributes in your XAML markup, such as in the following:
<c1:C1TabItem Header="Hello World"/>
You can also customize the header using the HeaderTemplate.