Rectangle coins biseautés et non arrondis ??

int x = 10;
int y = 10;
int width = 100;
int height = 100;
int c = 10;

      
GraphicsPath path = new GraphicsPath();
path.AddLines(new Point[] { 
  new Point(x + c, y),
  new Point(x + width - c, y),
  new Point(x + width, y + c),
  new Point(x + width, y + height - c),
  new Point(x + width - c, y + height),
  new Point(x + c, y + height),
  new Point(x, y + height - c),
  new Point(x, y + c),
});
path.CloseFigure();