using System;

using System.Linq;      

using System.Collections.Generic;

public class Program

{

    public static void Main()

    {

        List<int> inputNumbers = new List<int>(){156, 14, 28,34};

        int givenNumber = 4;

        var numbers = inputNumbers.Where(x=> 

                                 x.ToString().Contains(givenNumber.ToString())

                                ).ToList();

        Console.WriteLine("Input Numbers : {0}", String.Join("\t",inputNumbers));

        Console.WriteLine("\n Numbers having {0} : {1}", givenNumber, String.Join("\t",numbers));

    }

}