title: How can I sync the scrolling of two multiline textboxes?
body: <p>How can I sync the scrolling of two multiline textboxes in C# (WinForms)?</p>
  
  <p>When you scroll up/down a line in TextBox A, TextBox B should scroll up/down too.
  The same the other way around.</p>
  
  <p>Is this achievable without custom controls?</p>