public string this[Pupil pupil, Lesson lesson]
{
get
{
try
{
return(marks[Lessons.IndexOf(lesson), Pupils.IndexOf(pupil)]);
}
catch (Exception)
{
throw new IndexOutOfRangeException("pupil or lesson haven't found");
}
}
set
{
try
{
marks[Lessons.IndexOf(lesson), Pupils.IndexOf(pupil)] = value;
}
catch (Exception)
{
throw new IndexOutOfRangeException("pupil or lesson haven't found");
}
}
}