InterfaceConstraintDemo.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace Theory8_1
{
    interface IDetails
    {
        void GetDetails();
    }

    class Student: IDetails
    {
        private string _studName;
        private int _studID;
        public Student(string name, int num)
        {
            _studID = num;
            _studName = name;
        }


        public void GetDetails()
        {
            Console.WriteLine(_studID + "\t" + _studName);
        }
    }

    class GenericList<T> where T:IDetails
    {
        T[] _value = new T[3];
        private int _counter = 0;
        public void Add(T val)
        {
            _value[_counter] = val;
            _counter++;
        }

        public void Display()
        {
            for (int i = 0; i < 3; i++)
            {
                _value[i].GetDetails();
            }
        }
    }
    class InterfaceConstraintDemo
    {
        static void Main(string[] args)
        {
            GenericList<Student> objList = new GenericList<Student>();
            objList.Add(new Student("Wilson", 120));
            objList.Add(new Student("Jack", 130));
            objList.Add(new Student("Peter", 140));
            objList.Display();
        }
    }
}