public void AddWeakStudent(WeakStudent student)
{
if (student != null)
{
this.students.Add(student);
}
else
{
throw new ArgumentNullException("Added student cannot be null.");
}
}
public IEnumerable<WeakStudent> FoundAllWeakStudents(Func<Student, bool> predicate)
{
foreach (var student in this.allStudents)
{
if (predicate(student))
{
WeakStudent weakStudent = new WeakStudent(student.Name, student.Grade)
{
Marks = student.Marks,
};
weakStudent.Attach(this.psychologist);
yield return weakStudent;
}
}
}
public void Update(WeakStudent student)
{
Console.WriteLine("Name: {0}, Gread: {1}", student.Name, student.Grade);
Console.WriteLine("Marks: {0}", string.Join(", ", student.Marks));
}