static void Main(string[] args)
{
// An array is already an IEnumerable => foreach works
var array = new int[] { 1, 2, 3 };
foreach (var a in array)
{
Console.WriteLine($"A is {a}");
}
// The foreach loop will be compile down to this version (low-level)
var enumerator = array.GetEnumerator();
while (enumerator.MoveNext()) // Return true if there is another item
{
Console.WriteLine($"Enumerator A is {enumerator.Current}");
}
// ------------------------ CUSTOM ENUMERABLE --------------------------------
GradeBook gradebook = new GradeBook();
gradebook.AddStudent(new Student()
{
FirstName = "Lejing", LastName = "Huang", UHID = 1800000, Grade = 85
});
gradebook.AddStudent(new Student()
{
FirstName = "Tony", LastName = "Stark", UHID = 1800001, Grade = 60.5m
});
gradebook.AddStudent(new Student()
{
FirstName = "Winnie", LastName = "Li", UHID = 1800002, Grade = 90
});
gradebook.AddStudent(new Student()
{
FirstName = "Simon", LastName = "Shaw", UHID = 1800003, Grade = 10
});
foreach (Student student in gradebook)
{
Console.WriteLine($"Name: {student.FirstName} {student.LastName}, UHID: {student.UHID}, Grade: {student.Grade}");
}
}
