面板边框实心透明效果 c#

Question

I would like to know how to archieve this type of border panel effect on Winforms, i got the bottom line and right line already using the Fixed3d option, but no luck with the top and left side

Answer 1

I already got it with this code on the OnPaint event, if someone is looking for the same feel can look on this code example

private void panel1_Paint(object sender, PaintEventArgs e)
        {
            ControlPaint.DrawBorder(e.Graphics, panel1.ClientRectangle,
               Color.White, 2, ButtonBorderStyle.Solid,
               Color.White, 2, ButtonBorderStyle.Solid, 
               Color.FromArgb(100,160,160,160), 2, ButtonBorderStyle.Solid,
               Color.FromArgb(100, 160, 160, 160), 2 ButtonBorderStyle.Solid);

ControlPaint.DrawBorder(e.Graphics, panel1.ClientRectangle,
               Color.FromArgb(100, 160, 160, 160), 1, ButtonBorderStyle.Solid,
               Color.FromArgb(100, 160, 160, 160), 1, ButtonBorderStyle.Solid,
               Color.White, 1, ButtonBorderStyle.Solid,
               Color.White, 1, ButtonBorderStyle.Solid)
        }