C# List and Uses

List<T> class represents the list of objects which can be accessed by index. It comes under the System.Collection.Generic namespace. List class can be used to create a collection of different types like integers, strings etc. List<T> class also provides the methods to search, sort, and manipulate lists.

Example: List<T>

List<int> intList = new List<int>();

//Or

IList<int> intList = new List<int>();

Represents a strongly typed list of objects that can be accessed by index. Provides methods to search, sort, and manipulate lists.




[System.Serializable]

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                                                    

















How to Add Elements into Lists

using System;
using System.Collections.Generic;

public class Program
{
 public static void Main()
 {
  IList<int> intList = new List<int>();
  intList.Add(10);
  intList.Add(20);
  intList.Add(30);
  intList.Add(40);
  
  Console.WriteLine(intList.Count);
  
  IList<string> strList = new List<string>();
  strList.Add("one");
  strList.Add("two");
  strList.Add("three");
  strList.Add("four");
  strList.Add("four");
  strList.Add(null);
  strList.Add(null);
  
  Console.WriteLine(strList.Count);
  
  IList<Student> studentList = new List<Student>();
  studentList.Add(new Student());
  studentList.Add(new Student());
  studentList.Add(new Student());
  
  Console.WriteLine(studentList.Count);
  
 }
}

public class Student
{ 
 
}