Remarks
The property returns null when the text selection contains multiple frame lines with mixed colors.
Gets or sets the color used to display the color of frame lines at the current text input position. If text is selected, the property specifies the color of frame lines used in the whole selected text. A frame line color can be set for table cells and paragraphs.
Introduced: X14.
public System.Drawing.Color? FrameLineColor { get; set; }
Public Property FrameLineColor() As Nullable(Of System.Drawing.Color)
The following XAML example shows how to bind the Bottom
<MenuItem
IsCheckable="True"
Header="Bottom Frame Line"
IsChecked="{Binding ElementName=textControl1, Path=InputFormat.BottomFrameLine}" />
The property returns null when the text selection contains multiple frame lines with mixed colors.