//to get user inputs
public void getData()
{
//creating a object from student class
Student objStudent = new Student();
objStudent.firstName = txtFirstName.Text;
//objStudent.lastName = txtLastName.Text;
objStudent.universityID = txtUniversityID.Text;
objStudent.age = Convert.ToInt32(txtAge.Text);
objStudent.dateOfBirth = Convert.ToDateTime(dtpBirthDate.Value);
objStudent.adress = txtAdress.Text;
objStudent.DepartmentID = Convert.ToInt32(cmbDepartment.SelectedValue);
systemManager objsystemManager = new systemManager();
objsystemManager.InsertStudentDetails(objStudent);
}