/// <summary>
/// Shows how to Update an existing record by Primary Key
/// </summary>
private void Update()
{
// first instantiate a new CourseEnrollment
CourseEnrollment objCourseEnrollment = new CourseEnrollment();
// assign the existing primary key(s)
// of the record you want updated
objCourseEnrollment.EnrollmentId = 12;
// assign values you want updated
objCourseEnrollment.CourseName = 12;
objCourseEnrollment.StudentName = 12;
objCourseEnrollment.Comments = "abc";
// finally, update an existing record
objCourseEnrollment.Update();
}