title: Textbox transparent like a hole on my winform
body: <p>So I've got a C# winform, with a panel and a textbox belonging to the panel. </p>
  
  <p>The problem is that the textbox appears as a hole on my winform. I can see what's behind it (my desktop, other windows etc). That sounds like a bug to me since, after some google research, I came to the conclusion that textboxes cannot be transparent. </p>
  
  <p>In case any of the following is relevant: winform transparency key is set to transparent, textbox <code>backcolor=white</code> and <code>forecolor=black</code>. </p>
  
  <p>I tried to restart both the visual studio and the computer but the problem persists. </p>
  
  <p>Is there any way to fix it? </p>