using System;

public class Program

{

    public static void Main()

    {

        //lab 11 Question 1

        string[] blab = new string[5];      //This Code compile

        //blab[5] = 5th string; // This code not work

        // Lab 11 question 2 - replacement

        Console.WriteLine("Write a string contain with word no: ");

        //define variable name

        string myString;

        //ask for input 

        myString= Console.ReadLine();

        //replace a "no" to a "yes"

        var replacement = myString. Replace("no","yes");

        //output

        Console.WriteLine(replacement);

        //Lab 11 Question 3 -case-insensitive ordinal comparison

        Console.WriteLine("Write the first string: ");

        //define variable name

        string String1;

        //ask for first string input

        String1=Console.ReadLine();

        Console.WriteLine("Write the second string: ");

        //define variable name for second string 

        string String2;

        //ask for second string input

        String2=Console.ReadLine();

        //case insensitive comparison

        var Same = string.Equals(String1, String2,  StringComparison.OrdinalIgnoreCase);

        //if else statement to show if the string 1 equal to string 2

        if (Same==true)

        { 

            Console.WriteLine("Equal.");

        }

        else

        {

            Console.WriteLine("Not Equal.");

        }

​

​

    }

}