Help to draw a ellipse in bitmap with Format8bppIndexed c#?

Hello.
I am new on c# and i want to drawn a ellipse in a bitmap with PixelFormat 8bppIndexed.
Any can help me?
Thanks.
I am new on c# and i want to drawn a ellipse in a bitmap with PixelFormat 8bppIndexed.
Any can help me?
Thanks.