title: How to DISABLE transparency for TextView in GTK#?
body: <p>I am making a GTK# application and I have some weird behavior with TextView (or perhaps ScrolledWindow, can't really tell):</p>
  
  <p><img src="https://i.imgur.com/H4fSdhi.png" alt="problem"></p>
  
  <p>It's basically copying whatever's behind it and using it as the background, when the background should be a solid color. When I switch tabs, it even displays what was in the previously selected tab.</p>
  
  <p>How do I fix this behavior?</p>