One of the ScrollBarMode enumeration values that indicates whether the scroll bars are displayed as soon as the contents exceed the length of the control.
The default is ScrollBarMode.Fixed.
Remarks
To display the scroll bars, you must have the Multiline property set to true. If set to ScrollBarMode.Fixed, the scroll bars are displayed all the time. If set to ScrollBarMode.Automatic, the scroll bars are visible only when the contents in the control exceed the length of the control.