internal dynamic EnrollCourse(EnrollCourse aEnrollCourse)
{
if (aStudentGateway.EnrolledCourseExist(aEnrollCourse.CourseId))
{
return("Course Already Enrolled");
}
else if (aStudentGateway.EnrollCourse(aEnrollCourse) > 0)
{
return("Enrolled Successfull");
}
else
{
return("Enrolled failed");
}
}