public virtual void DrawBackground()
{
using var backBrush = BackColor.GetCachedSolidBrushScope();
GraphicsInternal.FillRectangle(backBrush, Bounds);
}
public virtual void DrawBackground()
{
using FormsSolidBrush backBrush = new FormsSolidBrush(BackColor);
GraphicsInternal.FillRectangle(backBrush, Bounds);
}