property ChartView.LinkAssistantColor as Color
Specifies the color for assistant links.

TypeDescription
Color A color expression that indicates the color for links between assistant nodes. 
If the LinkAssistantColor property is equal with BackColor property no links are painted. Use the PenLink property to define the pen used to paint the links between nodes.  Use the PenLinkAssistant property to define the type of the pen used to paint the links between assistant nodes. For instance, if the LinkAssistantColor property has the same value as BackColor property, the control doesn't paint the links between the nodes. Use the PenWidthLinkAssistant property to specify the thickness of the links between assistant nodes. Use the LinkColor property to specify the color for links between nodes.