public ActionResult ShowDepartment(int id)
{
Dictionary <string, object> allInfo = new Dictionary <string, object>();
List <DepartmentClass> department = DepartmentClass.FindById(id);
List <StudentClass> students = JoinStudentDepartmentClass.GetStudentsByDepartmentId(id);
List <CourseClass> courses = JoinCourseDepartmentClass.GetCoursesByDepartmentId(id);
allInfo.Add("students", students);
allInfo.Add("courses", courses);
allInfo.Add("department", department);
return(View("ShowDepartment", allInfo));
}