title: How do I reset a .NET Windows Forms TextBox BackColor property?
body: <p>The default behavior of property <code>BackColor</code> of a <code>TextBox</code> is as follows: when enabled, it is <code>White</code> (<code>SystemColors.Window</code>), when disabled it is Gray (not sure what SystemColor this is).</p>
  
  <p>If I change the <code>BackColor</code> property, the same color is used for both Enabled and Disabled.  How do I reset the <code>BackColor</code> property (after it has been changed previously) so that the behavior reverts to the default?</p>
  
  <p>I have tried setting it back to <code>SystemColors.Window</code>, but then the box stays white when disabled.</p>