using System;

using System.Collections.Generic;

using System.Linq;

​

public class Student

{

    public static void Main()

    {

SortedList<int, string>  sNames= new SortedList<int, string>();

sNames.Add(3, "Shweta");

sNames.Add(1, "Anuradha");

sNames.Add(2, "Meera");

sNames.Add(4, null);

sNames.Add(10, "Payal");

sNames.Add(5, "Priya");

    foreach(KeyValuePair<int, string> kvp in sNames)

    Console.WriteLine("key: {0}, value: {1}", kvp.Key , kvp.Value );

        sNames[2] = "Riya"; //update value

        sNames[7] = "Radha"; // adds a new key-value if key does not exists

        foreach(KeyValuePair<int, string> kvp in sNames)

    Console.WriteLine("key: {0}, value: {1}", kvp.Key , kvp.Value );

    if(sNames.ContainsKey(4))

    {

    sNames[5] = "Priya";

    }

     string result;

     if(sNames.TryGetValue(5, out result))

    Console.WriteLine("Key: {0}, Value: {1}", 5, result); 

}

}

​

​

​