How to iterate through custom types?

Yes, till now we seen iterate through premitive type like int,float,double,….ect we have many way we can iterate like for,foreach,Interface based(IEnumerable,IEnumerable<T)), but now we want iterate through custom objects like employee,student,customer…ect.

In Custom types also we can enumerate through the objects in same like premitive types

Ex: Create one Custom type is Student

    class Student

    {     

            public Student()

            {

                                                 // Default Constructor

            }

            public Student(int sno, string sname)

            {

                this._stno = sno;

                this.stname = sname;   // Paramerized constructor

            }

            int _stno;

            public int Stno

            {

                get { return _stno; }

                set { _stno = value; }

            }

            private string stname;

            public string Stname

            {

                get { return stname; }

                set { stname = value; }

            }         

            static void Main()

            {

                Student stu = new Student(101, "naga");

                Student stu1 = new Student(102, "kasi");

                List<Student> obj = new List<Student>();

                obj.Add(stu);

                obj.Add(stu1);

                foreach (Student item in obj)

                {

                    Console.Write(item.Stno +"\n");

                    Console.Write(item.Stname + "\n");

                }

                Console.WriteLine();

                Console.WriteLine("-----2nd way---------"); 

Student[] objs = new Student[] { new Student(1, "anand"), new Student(2,"rohit")};

                // Or

                Student[] objs = new Student[2];

                objs[0]=new Student(104,"babuu");

                objs[1] = new Student(107, "chanti");
                 // Or
                 List<Student>  objs = new List<Student>();
                 objs.Add(new Student(11, "kasi"));
                 objs.Add(new Student(12, "babu"));        

                List<Student> stulists = new List<Student>(objs);

               

                foreach (Student item in stulists)

                {

                    Console.Write(item.Stno + "\n");

                    Console.Write(item.Stname + "\n");

                }

                Console.WriteLine("........3^rd way.............");

                IEnumerator<Student> objstu = obj.GetEnumerator();

                while (objstu.MoveNext())

                {

                    Student ss = objstu.Current;

                    Console.WriteLine(ss.Stno);

                    Console.WriteLine(ss.Stname);

                }               

                Console.Read();

            }

        }