using System;

using System.Collections.Generic;

​

public class Program

{

    public static void Main()

    {

        SortedList<int, char> alphabet = new SortedList<int, char>() { { 2, 'B' }, { 1, 'A' }, { 3, 'C' } };

​

        //Add() to add item

        Console.WriteLine("--------Add(): Items auto Sorted by key--------");

        alphabet.Add(4, 'D');

        alphabet.Add(5, 'E');

        // Add item by Key indexer

        alphabet[6] = 'F';

        alphabet[7] = 'G';

        // Update item value associated with key 7 from G to H

        alphabet[7] = 'H';

        foreach (var letter in alphabet)

            Console.WriteLine($"{letter.Key}, {letter.Value}");

        //Reset items

        alphabet = new SortedList<int, char>() { { 1, 'A' }, { 2, 'B' }, { 3, 'C' }, { 4, 'D' }, { 5, 'E' }, { 6, 'F' }, { 7, 'G' } };

        //Count to get total items

        Console.WriteLine("--------Count--------");

        Console.WriteLine(alphabet.Count); // Prints 7

        //Capacity to get number of items a list can hold

        Console.WriteLine("--------Capacity--------");

        Console.WriteLine(alphabet.Capacity); // Prints 8

        //Keys, Values 

        Console.WriteLine("--------Keys--------");

        foreach (var key in alphabet.Keys)

            Console.WriteLine(key);

        Console.WriteLine("--------Values--------");

        foreach (var value in alphabet.Values)

            Console.WriteLine(value);

        //Get value by key indexer

        Console.WriteLine("--------Get value by key indexer--------");

        Console.WriteLine(alphabet[1]); // Prints A   

        Console.WriteLine(alphabet[5]); // Prints E   

        // foreach loop

        Console.WriteLine("--------foreach loop--------");

        foreach (var letter in alphabet)

            Console.WriteLine($"{letter.Key}, {letter.Value}");

        //for loop

        Console.WriteLine("--------for loop--------");

        for (int i = 0; i < alphabet.Count; i++)

            Console.WriteLine($"{alphabet.Keys[i]}, {alphabet.Values[i]}");

        //ContainsValue(), ContainsKey()

        Console.WriteLine("--------ContainsValue(), ContainsKey()--------");

        Console.WriteLine(alphabet.ContainsValue('B')); // Prints True

        Console.WriteLine(alphabet.ContainsKey(10)); // Prints False

        //Reset items

        alphabet = new SortedList<int, char>() { { 1, 'A' }, { 2, 'B' }, { 3, 'C' }, { 4, 'D' }, { 5, 'E' }, { 6, 'F' }, { 7, 'G' } };

        // Remove(), RemoveAt()

        Console.WriteLine("--------Remove(), RemoveAt()--------");

        alphabet.Remove(2); //By Key

        alphabet.RemoveAt(3); // By Index   

        foreach (var letter in alphabet)

            Console.WriteLine($"{letter.Key}, {letter.Value}");

        // IndexOfKey(), IndexOfValue()

        Console.WriteLine("--------IndexOfKey(), IndexOfValue()--------");

        alphabet.IndexOfKey(2); //By Index by Key

        alphabet.IndexOfValue('B'); // Return Index by Value    

        foreach (var letter in alphabet)

            Console.WriteLine($"{letter.Key}, {letter.Value}");

​

        //Clear() to remove all the items

        Console.WriteLine("--------Clear()--------");

        alphabet.Clear();

        Console.WriteLine(alphabet.Count); // Prints 0

    }

}