/// <summary>
/// This method requires a course id and a student id to add a subscription entry to the database.
/// </summary>
/// <param name="courseId">The courseId</param>
/// <param name="studentId">The studentId</param>
/// <returns>Returns a bool whether it succeeded or not.</returns>
public bool subscribeToNonSubscribedCourse(int courseId, int studentId)
{
QueryStrings queryStrings = new QueryStrings();
return(queryStrings.addStudentToCourse(courseId, studentId));
}