using System;

using System.Collections;

using System.Collections.Generic;

using System.Diagnostics;

​

namespace GenericsExample {

    class Program {

        static void Main<R>(string[] args) {

            //generic list

            List<int> ListGeneric = new List<int> { 5, 9, 1, 4 };

            //List<R> ListGeneric1 = List<R> [3];

            //non-generic list

            ArrayList ListNonGeneric = new ArrayList { 5, 9, 1, 4 };

            // timer for generic list sort

            Stopwatch s = Stopwatch.StartNew();

            ListGeneric.Sort();

            s.Stop();

            Console.WriteLine($"Generic Sort: {ListGeneric}  \n Time taken: {s.Elapsed.TotalMilliseconds}ms");

​

            //timer for non-generic list sort

            Stopwatch s2 = Stopwatch.StartNew();

            ListNonGeneric.Sort();

            s2.Stop();

            Console.WriteLine($"Non-Generic Sort: {ListNonGeneric}  \n Time taken: {s2.Elapsed.TotalMilliseconds}ms");

            Console.ReadLine();

        }

    }

    // Declare the generic class.

    public class GenericList<T>

    {

        public void Add(T input) { 

            //get{ return next;}

            //set { next = value; }

        //get = input;

        }

        public void Remove(T input) { }

    }

    class TestGenericList

    {

        private class ExampleClass { }

        static void Main1()

        {

            // Declare a list of type int.

            GenericList<int> list1 = new GenericList<int>();

            list1.Add(1);

            list1.Remove(1);

​

            // Declare a list of type string.

            GenericList<string> list2 = new GenericList<string>();

            list2.Add("");

​

            // Declare a list of type ExampleClass.

            GenericList<ExampleClass> list3 = new GenericList<ExampleClass>();

            list3.Add(new ExampleClass());

        }

    }

}