List in C#

DevSniper
Published : 25 February 2024

116 Views

Namespace :- System.Collections.Generic

Assembly :- System.Collections.dll

Signature :-

public class List<T> : 
   System.Collections.Generic.ICollection<T>,
   System.Collections.Generic.IEnumerable<T>,
   System.Collections.Generic.IList<T>,
   System.Collections.Generic.IReadOnlyCollection<T>,
   System.Collections.Generic.IReadOnlyList<T>,
   System.Collections.IList

Constructors

1. public List ();

2. public List (System.Collections.Generic.IEnumerable<T> collection);

3. public List (int capacity);

Properties

1. Capacity

public int Capacity { get; set; }

2. Count

public int Count { get; }

3. Item[Int32]

public T this[int index] { get; set; }

Creating and adding element in a List

1. using collection initializer

using System;
using System.Collections.Generic;

class Program
{
    static void Main()
    {
        var list = new List<string> {"C#","Java","C++","Python"};
        Console.WriteLine($" index 0 value : {list[0]} and index 2 value : {list[2]}");
    }
}

index 0 value : C# and index 2 value : C++

2. using Add() method

using System;
using System.Collections.Generic;

class Program
{
    static void Main()
    {
        var list = new List<string>();
        list.Add("C#");
        list.Add("Java");
        list.Add("C++");
        list.Add("Python");
        Console.WriteLine($" index 0 value : {list[0]} and index 2 value : {list[2]}");
    }
}

index 0 value : C# and index 2 value : C++

IMPORTANT POINTS

It can has duplicate elements.

It will store strongly typed of objects.

List element can be accessed by index.