WPF TextBox automatically scrolls cursor into view when focused

Question

I'm making a simple log viewer which is composed of a big TextBox which shows the file, and a DispatchTimer that updates the TextBox from time to time by setting its Text property.

Whenever the focus is set to the TextBox, it keeps automatically scrolling to the place where the cursor is, even when I'm explicitly issue ScrollToEnd() on it. (In that case, the UI shows the scrollbar "jumping" from the end back to the cursor position).

How can I cause the TextBox to keep its current scrolled position and ignore the position of the cursor?

Answer 1

For Scrolling it is better to use a ScrollViewer

 <ScrollViewer HorizontalScrollBarVisibility="Auto" Height="80">
   <TextBlock Name="debugLog" />
 </ScrollViewer>

Assuming the Log is not editable.