{

class Program

{

static void Main(string[] args)

{

string s = "42,12";

List<int> list = new List<int>() { 4, 4, 5, 61, 1};

List<int> list2 = new List<int>() { 1, 4, 5, 1, 8 };

HashSet<int> set = new HashSet<int>(list);

HashSet<int> set2 = new HashSet<int>(list2);

ConcurrentBag<int> bag = new ConcurrentBag<int>(list2);

var e = set.Union(bag);

Console.WriteLine(bag.Count(1));

Console.WriteLine("Hello Extension Methods!");

Console.WriteLine(list.IncludesAll(list2));

Console.WriteLine(list.NotEmpty());

var temp = list.SelectOcl(e => e > 4);

Console.WriteLine(temp.Count);

temp.Println();

}

}