C#: Collection Example

Collection C#

Example C# 2018

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

namespace ConsoleApplication1
{
    class Program
    {
        static void Main(string[] args)
        {
            methodDisplay();
        }

        static string[] methodString()
        {
            string[] array = new string[3];
            array[0] = "Thank";
            array[1] = "To";
            array[2] = "Array String[]";
            return array;
        }
        static ArrayList methodArrayList()
        {
            ArrayList arrayList = new ArrayList();
            arrayList.Add("ArrayList1");
            arrayList.Add("ArrayList2");
            arrayList.Add("ArrayList3");
            arrayList.Add("ArrayList4");
            return arrayList;
        }
        static List<String> methodList()
        {
            List<String> list = new List<String>();
            list.Add("List1");
            list.Add("List2");
            list.Add("List3");
            list.Add("List4");
            return list;
        }
        static Hashtable methodHashtable()
        {
            Hashtable hashtable = new Hashtable();
            hashtable.Add("key1", "hash1");
            hashtable.Add("key2", "hash2");
            hashtable.Add("key3", "hash3");
            //string str = hashtable["key5"].ToString();
            return hashtable;
        }
        static Dictionary<string, string> methodDictionary()
        {
            Dictionary<string, string> dictionary = new Dictionary<string, string>();
            dictionary.Add("key1", "key11");
            dictionary.Add("key2", "key12");
            dictionary.Add("key3", "key13");
            //string str = dictionary["key5"].ToString();
            return dictionary;
        }
        static Stack<string> methodStack()
        {
            // Stack LIFO
            Stack<string> stack = new Stack<string>();
            stack.Push("stack1");
            stack.Push("stack2");
            stack.Push("stack3");
            //string str = stack.Pop().ToString()
            return stack;
        }
        static Queue<string> methodQueue()
        {
            // Queue FIFO
            Queue<string> queue = new Queue<string>();
            queue.Enqueue("queue1");
            queue.Enqueue("queue2");
            queue.Enqueue("queue3");
            //string str = queue.Dequeue().ToString();
            return queue;
        }
        static void methodDisplay()
        {
            // Show Array
            Console.WriteLine(string.Join("->", methodString()));

            // Show ArrayList
            Console.WriteLine(string.Join("->", methodArrayList().ToArray()));

            // Show List
            Console.WriteLine(string.Join("->", methodList()));

            // Show Hashtable
            Console.WriteLine(string.Join("->", methodHashtable()["key2"].ToString()));

            // Show Dictionary
            Console.WriteLine(string.Join("->", methodDictionary()));

            // Show Stack
            Console.WriteLine(string.Join("->", methodStack()));

            // Show Queue
            Console.WriteLine(string.Join("->", methodQueue()));

            // Endding and Reading
            Console.ReadLine();
        }
    }
}