Form with Rounded Borders in C#? [duplicate]

Answer 1

    public static void RoundBorderForm(Form frm)
    {

        Rectangle Bounds = new Rectangle(0, 0, frm.Width, frm.Height);
        int CornerRadius = 20;
        System.Drawing.Drawing2D.GraphicsPath path = new System.Drawing.Drawing2D.GraphicsPath();
        path.AddArc(Bounds.X, Bounds.Y, CornerRadius, CornerRadius, 180, 90);
        path.AddArc(Bounds.X + Bounds.Width - CornerRadius, Bounds.Y, CornerRadius, CornerRadius, 270, 90);
        path.AddArc(Bounds.X + Bounds.Width - CornerRadius, Bounds.Y + Bounds.Height - CornerRadius, CornerRadius, CornerRadius, 0, 90);
        path.AddArc(Bounds.X, Bounds.Y + Bounds.Height - CornerRadius, CornerRadius, CornerRadius, 90, 90);
        path.CloseAllFigures();

        frm.Region = new Region(path);
        frm.Show();
    }