public void MoveStudentInGroup(string numberGroup, string id)
{
if (numberGroup == null)
{
throw new ArgumentException();
}
if (id == null)
{
throw new ArgumentNullException(nameof(id));
}
IStudent e = GetStudent(id);
IGroup g = GetGroup(numberGroup);
g.AddStudent(new Student(e.Name, e.DateBirthday, e.Id));
Students.Remove(e);
}
public void MoveStudentToAnotherGroup(string id, string toNumberGroup)
{
if (id == null)
{
throw new ArgumentNullException(nameof(id));
}
if (toNumberGroup == null)
{
throw new ArgumentException();
}
IGroup g1 = GetGroup(id.Substring(0, 5));
IGroup g2 = GetGroup(toNumberGroup);
var s = g1.GetStudent(id);
g2.AddStudent(s);
g1.RemoveStudent(id);
}