title: Collapse 'button' for splitcontainer control
body: <p>I'm using Microsoft's <strong><a href="https://docs.microsoft.com/en-us/dotnet/api/system.windows.forms.splitcontainer?view=netframework-4.8" rel="nofollow noreferrer">SplitContainer</a></strong> control in my <strong>WinForms</strong> desktop application.</p>
  
  <p>I'd like to have a small button (or any nice UI element) between the panels of the splitter control to collapse one of the panels. E.g. a 'button' with two parts, if I click one part, the right side panel collapses, if I click on the other part, the left side panel collapses.</p>
  
  <p>Is this possible? How could that be implemented?</p>