C# Scroll to top of listbox

if(results.Items.Count > 0)
    results.ScrollIntoView(results.Items[0]);

ScrollIntoView didn't work for me, but this did:

VisualTreeHelperEx.FindDescendantByType<ScrollViewer>(YourListView)?.ScrollToTop();

This uses the Extended WPF Toolkit to get the ScrollViewer, but you can of course do it manually e.g. this answer.