title: How to remove separator border row between Columnheader and Data row in listview in WPF
body: <p>I am making a WPF program in VS2017. But I don't know how to remove vertical separator between Columnheader and Data row. 
  <a href="https://i.stack.imgur.com/YzXHL.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/YzXHL.png" alt="enter image description here"></a></p>
  
  <p>I want to remove bottom border of header of above image.</p>