Csharp/CSharp Tutorial/Data Structure/IList

IList<T>: add, insert, and remove some items

using System;
using System.Collections;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.Text;
public class MainClass
{
    public static void Main()
    {
        IList<double> myList = new List<double>();
        myList.Add(1.54);
        myList.Add(29.2234);
        myList.Insert(1, 39.99);
        myList.Add(48.2);
        myList.Remove(10.4);
    }
}

IList<T>: enumerate the list using Count and IList<T>"s indexer

using System;
using System.Collections;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.Text;
public class MainClass
{
    public static void Main()
    {
        IList<double> myList = new List<double>();
        myList.Add(10.5);
        myList.Add(209.224);
        myList.Insert(1, 3.999);
        myList.Add(48.2);
        myList.Remove(10.4);
        
        
        for (int i = 0; i < myList.Count; i++)
            Console.WriteLine(myList[i]);
    }
}

10.5
3.999
209.224
48.2

IList<T>: print some specific element indexes

using System;
using System.Collections;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.Text;
public class MainClass
{
    public static void Main()
    {
        IList<double> myList = new List<double>();
        myList.Add(10.5);
        myList.Add(209.224);
        myList.Insert(1, 3.999);
        myList.Add(48.2);
        myList.Remove(10.4);
        Console.WriteLine("IndexOf {0} = {1}", 209.2234, myList.IndexOf(209.2234));
        Console.WriteLine("IndexOf {0} = {1}", 10.54, myList.IndexOf(10.54));
    }
}

IndexOf 209.2234 = -1
IndexOf 10.54 = -1