| Class | Description | |
|---|---|---|
 | C1SlopedBorderAdjustConverter | Converter used to adjust a path so that it renders its stroke inside and not to both side of its position. |
| C1TabControl | Represents a control that contains multiple items that share the same space on the screen. |
| C1TabItem | Represents a selectable item in a C1TabControl. |
| C1TabItemBorder | Control containing the header of a C1TabItem. Supports different appearances, defined by the Shape property. |
| C1TabItemBorderClipConverter | Converter used to clip off the bottom part of ribbon borders. |
| C1TabItemPresenter | Internal element used in both C1TabItem and C1DockTabItem to avoid repetition. |
| C1TabPanel | Internal element used in the control template of C1TabControls. |
| CancelSourceEventArgs | Provides data for a cancelable event. |
