public StudentBuss(string no, string pwd, string name, string gender, Grade grade,
string phone, string address, DateTime borndate, string email)
: base(no, pwd, name, gender, grade, phone, address, borndate, email)
{
this.GradeName = grade.GradeName;
}
public Student(string studentNo, string loginPwd, string studentName, string gender, Grade grade, string phone, string address, DateTime bornDate, string email)
{
this.StudentNo = studentNo;
this.LoginPwd = loginPwd;
this.StudentName = studentName;
this.Gender = gender;
this.Grade = grade;
this.Phone = phone;
this.Address = address;
this.Email = email;
this.BornDate = bornDate;
}