CSharp - List<T> Type

Introduction

The following code demonstrates List's properties and methods.

Demo

using System;
using System.Collections.Generic;
class MainClass//from w ww .  jav a2 s .  c om
{
   public static void Main(string[] args)
   {
     List<string> words = new List<string>();    // New string-typed list

     words.Add ("A");
     words.Add ("B");
     words.AddRange (new[] { "C", "D" } );
     words.Insert (0, "E");                           // Insert at start
     words.InsertRange (0, new[] { "F", "G" });   // Insert at start

     words.Remove ("A");
     words.RemoveAt (3);                         // Remove the 4th element
     words.RemoveRange (0, 2);                   // Remove first 2 elements

     // Remove all strings starting in 'n':
     words.RemoveAll (s => s.StartsWith ("n"));

     Console.WriteLine (words [0]);                          // first word
     Console.WriteLine (words [words.Count - 1]);            // last word
     foreach (string s in words) Console.WriteLine (s);      // all words
     List<string> subset = words.GetRange (1, 2);            // 2nd->3rd words

     string[] wordsArray = words.ToArray();    // Creates a new typed array

     // Copy first two elements to the end of an existing array:

     string[] existing = new string [1000];
     words.CopyTo (0, existing, 998, 2);

     List<string> upperCastWords = words.ConvertAll (s => s.ToUpper());
     List<int> lengths = words.ConvertAll (s => s.Length);

   }
}

Result