Each panel in SplitContainer can be fixed or resizable. Users can resize panels on the fly by dragging the special splitter element. The actual size of the panel can be updated when the user releases the mouse button or while dragging.
Panels can display headers with caption text. You can adjust the appearance of headers with simple property settings.
SplitContainer also supports nesting other SplitContainer controls to create more complex layouts.
Panels can display a collapsible button that, when clicked, minimizes the panel to the edge it's docked to.
SplitContainer supports system and Office visual styles, so your panels can match the rest of your UI.