List Add and Remove

List<T> can grow as items are added and shrink as items are removed.

ListAddRemove.cs

using System;
using System.Collections.Generic;

class Program
{
    static void Main()
    {
        string extra = ;
        List<string> fruits = new List<string> { "apple", "pear" };
        fruits.Add(extra);
        bool removed = fruits.Remove("pear");
        string joined = string.Join(",", fruits);

        Console.WriteLine($"extra={extra}");
        Console.WriteLine($"removed={removed}");
        Console.WriteLine($"joined={joined}");
    }
}

using System;
using System.Collections.Generic;

class Program
{
    static void Main()
    {
        string extra = ;
        List<string> fruits = new List<string> { "apple", "pear" };
        fruits.Add(extra);
        bool removed = fruits.Remove("pear");
        string joined = string.Join(",", fruits);

        Console.WriteLine($"extra={extra}");
        Console.WriteLine($"removed={removed}");
        Console.WriteLine($"joined={joined}");
    }
}

using System;
using System.Collections.Generic;

class Program
{
    static void Main()
    {
        string extra = ;
        List<string> fruits = new List<string> { "apple", "pear" };
        fruits.Add(extra);
        bool removed = fruits.Remove("pear");
        string joined = string.Join(",", fruits);

        Console.WriteLine($"extra={extra}");
        Console.WriteLine($"removed={removed}");
        Console.WriteLine($"joined={joined}");
    }
}

list A list is an ordered collection that can change size.