How Can I improve Print resolution in C# Form Application

Question

private void printD_PrintPage(object sender, PrintPageEventArgs e)
    {
        Bitmap memoryimg;
        Panel p = BillBody;
        Graphics g = p.CreateGraphics();
        memoryimg = new Bitmap(p.Width, p.Height);
        p.DrawToBitmap(memoryimg, new Rectangle(0, 0, p.Width, p.Height));
        Rectangle rec = e.PageBounds;
        e.Graphics.DrawImage(memoryimg, (rec.Width / 2) - (BillBody.Width / 2), 10);
    }

My Result here

Cilck to see

even I used code SetResolution(float xDpi, float yDpi) Method like this

private void printD_PrintPage(object sender, PrintPageEventArgs e)
    {
        Bitmap memoryimg;
        Panel p = BillBody;
        Graphics g = p.CreateGraphics();
        memoryimg = new Bitmap(p.Width, p.Height,g);
        memoryimg.SetResolution(600, 600);
        p.DrawToBitmap(memoryimg, new Rectangle(0, 0, p.Width, p.Height));
        Rectangle rec = e.PageBounds;
        e.Graphics.DrawImage(memoryimg, (rec.Width / 2) - (BillBody.Width / 2), 10);
    }

But this time this Happen See Here Can Anyone Help me