ASP.NET - como mostrar una imagen en vs .net

private System.Drawing.Image obtenerImagen(int iImageID )

{

   SqlConnection cn=new SqlConnection("server=ServidorBD;database=BaseDeDatos;Uid=Usuario ;pwd= Password");

   string strCmdText = "GetImageBinary";

   SqlCommand cmd = new SqlCommand();

   cmd.CommandText = strCmdText;

   cmd.CommandType = CommandType.StoredProcedure;

   cmd.Connection = cn;

   SqlParameter sqlparamItemID = new SqlParameter("@ItemId",SqlDbType.Int);

   sqlparamItemID.Value = iImageID;

   cmd.Parameters.Add(sqlparamItemID);

   MemoryStream ms = new MemoryStream();

   cn.Open();

   byte [] img = (byte [])cmd.ExecuteScalar();

   cn.Close();

   if (img == null )

   {

      MessageBox.Show ("Imagen no encontrada en la base de datos");

   }

   ms.Write(img, 0 ,img.GetUpperBound(0) + 1);

   System.Drawing.Image imgImagen=System.Drawing.Image.FromStream(ms);

   ms.Close();

   return imgImagen;

}

pictureBox1.Image = obtenerImagen(3);