В gdi возникла ошибка общего вида mathcad

if (speed < 100)
{
    using (Font fnt = new Font("Times New Roman", 22, FontStyle.Bold))
    using (Brush br = new SolidBrush(Color.DarkRed))
    {                
        g.DrawString(speed.ToString(), fnt, br, -4, 0);
    }
}
//...и т.д.

                           kbytes_k = kbytes - result_n;
            lb = kbytes_k.ToString();

            label1.Text = speed.ToString()+" кб\с";
            if (lb.Length < 4) { noti = lb + " кб"; label4.Text = noti; }
            if (lb.Length > 3) 
            {
                hh = Convert.ToInt64(kbytes_k) / 1024;
                uu = Convert.ToInt64(kbytes_k) % 1024;
                noti = hh.ToString()+" м "+uu.ToString()+" кб";
                label4.Text = noti;
            }

                        notifyIcon1.Text = "Скачано всего: " + noti;
            using (Brush br = new SolidBrush(Color.LightBlue))
            {
                g.FillRectangle(br, new Rectangle(0, 0, 32, 32));
            }
            if (speed < 100)
            {
                using (Font fnt = new Font("Times New Roman", 22, FontStyle.Bold))
                using (Brush br = new SolidBrush(Color.DarkRed))
                {
                    g.DrawString(speed.ToString(), fnt, br, -4, 0);
                }
            }
            if (speed >= 100)
            {
                using (Font fnte = new Font("Verdana", 14))
                using (Brush bre = new SolidBrush(Color.DarkRed))
                {
                    g.DrawString(speed.ToString(), fnte, bre, -4, 0);
                }
            }

                        trayimage = new Bitmap(trayimagen);

                        Icon icon = Icon.FromHandle(trayimage.GetHicon());
            notifyIcon1.Icon = icon;
            trayimage.Dispose();

                  }

                           kbytes_k = kbytes - result_n;
            lb = kbytes_k.ToString();

            label1.Text = speed.ToString()+" кб\с";
            if (lb.Length < 4) { noti = lb + " кб"; label4.Text = noti; }
            if (lb.Length > 3) 
            {
                hh = Convert.ToInt64(kbytes_k) / 1024;
                uu = Convert.ToInt64(kbytes_k) % 1024;
                noti = hh.ToString()+" м "+uu.ToString()+" кб";
                label4.Text = noti;
            }

                        notifyIcon1.Text = "Скачано всего: " + noti;
            using (Brush br = new SolidBrush(Color.LightBlue))
            {
                g.FillRectangle(br, new Rectangle(0, 0, 32, 32));
            }
            if (speed < 100)
            {
                using (Font fnt = new Font("Times New Roman", 22, FontStyle.Bold))
                using (Brush br = new SolidBrush(Color.DarkRed))
                {
                    g.DrawString(speed.ToString(), fnt, br, -4, 0);
                }
            }
            if (speed >= 100)
            {
                using (Font fnte = new Font("Verdana", 14))
                using (Brush bre = new SolidBrush(Color.DarkRed))
                {
                    g.DrawString(speed.ToString(), fnte, bre, -4, 0);
                }
            }

                        trayimage = new Bitmap(trayimagen);

                        icon = Icon.FromHandle(trayimage.GetHicon());
            notifyIcon1.Icon = icon;
            trayimage.Dispose();
            icon.Dispose();
            Icon.Dispose();

                                }

   private void GetHicon_Example(PaintEventArgs e)
    {

                         // Create a Bitmap object from an image file.
        Bitmap myBitmap = new Bitmap(@"c:FakePhoto.jpg");

                         // Draw myBitmap to the screen.
        e.Graphics.DrawImage(myBitmap, 0, 0);

                         // Get an Hicon for myBitmap.
        IntPtr Hicon = myBitmap.GetHicon();

        // Create a new icon from the handle. 
    Icon newIcon = Icon.FromHandle(Hicon);

                      // Set the form Icon attribute to the new icon.
        this.Icon = newIcon;

                // Destroy the Icon, since the form creates
    // its own copy of the icon.
        DestroyIcon(newIcon.Handle);

        }