using System;

using System.Collections.Generic;

using System.Linq;

public class Program

{

    public static void Main()

    {

        wrongMethod();

        rightMethod();

        anotherMethod();

    }

    private static void wrongMethod()

    {

        var inputList =  new List<int> { 15, 24, 11, 22, 10, 12 };

​

        for (int i = 0; i < inputList.Count; i++)

        {

            if (inputList[i] % 11 == 0)

            {

                inputList.RemoveAt(i);

            }

        }

        foreach (var element in inputList)

        {

            Console.Write(element + " ");

        }

        Console.WriteLine();

    }

    private static void rightMethod()

    {

        var filteredList = new List<int>();

        var inputList = new List<int> { 15, 24, 11, 22, 10, 12 };

        for (int i = 0; i < inputList.Count; i++)

        {

            if (inputList[i] % 11 != 0)

            {

                filteredList.Add(inputList[i]);

            }

        }

        foreach (var element in filteredList)

        {

            Console.Write(element + " ");

        }

        Console.WriteLine();

    }

    private static void anotherMethod()

    {

        var inputList = new List<int> { 15, 24, 11, 22, 10, 12 };

        foreach (var element in inputList.Where(x => x % 11 != 0))

        {

            Console.Write(element + " ");

        }

    }

}