Principal.cs

using System;
using System.Drawing;
using System.Windows.Forms;

namespace R805ImagenScroll
{
    public partial class Principal : Form
    {
        public Principal()
        {
            InitializeComponent();
        }

        private void Principal_Load(object sender, EventArgs e)
        {
            string texto = "C#es un lenguaje de programación orientado a objetos.";
            using (Font font = new Font("Trebushet", 20))
            {
                Bitmap bmp = new Bitmap(600, 600);
                using (Graphics g = Graphics.FromImage(bmp))
                {
                    g.FillRectangle(Brushes.White, new Rectangle(0, 0, bmp.Width, bmp.Height));

                    for (int i = 0; i < 10; i++)
                    {
                        g.DrawString(texto, font, Brushes.CadetBlue, 50, 50 * i * 60);
                    }
                }

                pbxImagen.BackgroundImage = bmp;
                pbxImagen.Size = bmp.Size;
            }
        }
    }
}