C# Lists

A List in C# is a dynamic data structure that stores multiple objects of a specified type. These objects can be accessed by their zero-based index. Unlike arrays. Lists can grow to accommodate a very large number of elements (up to about 2 billion), limited primarily by available system memory and the maximum value of an integer index.”

Syntax

Note: Before creating a list, include the System.Collections.Generic namespace.

There are two common ways to create a List in C#:

// Creating a List without any elements
List<T> myList = new List<T>();

Or alternatively:

// Creating a List with three elements
List<T> myList = new List<T> { element1, element2, element3 };

Parameters:

• T: Represents any data type.
• element: Any object or variable of type T.

Example: Creating and Accessing a List

In this example, a list is created, numbers are added, and elements are accessed by their index:

using System;
using System.Collections.Generic;

class Program
{
  static void Main()
  {
    // Create a list of integers
    List<int> numbers = new List<int>();

    // Add elements to the list
    numbers.Add(10);
    numbers.Add(20);
    numbers.Add(30);

    // Access elements by index
    Console.WriteLine(numbers[0]);
    Console.WriteLine(numbers[1]);
    Console.WriteLine(numbers[2]);
  }
}

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The output of this code is:

10
20
30

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Codebyte Example: Printing elements in a List

This example creates a new List that stores three numbers. Since each element has an index, we can print each element in the numbers list by its index:

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