TAPS.MVC.Controllers.CourseController.Delete C# (CSharp) Method

        public ActionResult Delete(string id)
        {
            var cp = new CourseProvider();
            if (!string.IsNullOrEmpty(id))
            {
                int courseId;
                try
                {
                    courseId = Convert.ToInt32(id);
                }
                catch (Exception)   //not an integer
                {
                    return RedirectToAction("Index", "Course");
                }

                try
                {
                    Course course = cp.GetCourseByID(courseId);
                    if (course != null)
                    {
                        cp.DeleteCourse(course);
                        return View("Deleted");
                    }
                    return RedirectToAction("Index");
                }
                catch (Exception err)
                {
                    if (err.InnerException != null && err.InnerException.Message.Contains("The DELETE statement conflicted with the REFERENCE constraint"))
                    {
                        ViewData["ErrorMessage"] =
                            "Course could not be deleted.. there are assoiciated data.. cannot delete";
                    }
                    else
                    {
                        ViewData["ErrorMessage"] =
                            "Course Could not be deleted.. there is a problem";
                    }
                    return View("NotDeleted");
                }
            }
            return RedirectToAction("Index");
        }