shassaan

//Access individual item using indexer
List<int> numbers = new List<int>() 
{ 1, 2, 5, 7, 8, 10 }; 

Console.WriteLine(numbers[0]); // prints 1 
Console.WriteLine(numbers[1]); // prints 2 
Console.WriteLine(numbers[2]); // prints 5 
Console.WriteLine(numbers[3]); //  prints  7

shassaan

List<int> primeNumbers = new List<int>(); 
primeNumbers.Add(1);
primeNumbers.Add(3); 
primeNumbers.Add(5); 
primeNumbers.Add(7);
 
var cities = new List<string>(); 
cities.Add("NewYork"); 
cities.Add("London"); 
cities.Add("Mumbai"); 

shassaan

//Access individual item using indexer
int firstElement = (int) arlist[0];
string secondElement = (string) arlist[1]; 

//using var keyword without explicit casting
var firstElement = arlist[0]; 
var secondElement = arlist[1];


//update elements

shassaan

//Adding elements
var arlist = new ArrayList();

 arlist.Add(1);
 arlist.Add("Bill");
 arlist.Add(" ");
 arlist.Add(true);
 arlist.Add(4.5);
 arlist.Add(null);