https://learn.microsoft.com/en-us/dotnet/api/system.windows.controls.scrollviewer.verticalscrollbarvisibility?view=netframework-4.8.1&redirectedfrom=MSDN
ScrollViewer.VerticalScrollBarVisibility Property (System.Windows.Controls) | Microsoft Learn
Gets or sets a value that indicates whether a vertical ScrollBar should be displayed.
property systemwindowscontrolsmicrosoftlearn