using System;

using System.Collections.Generic;

using System.Linq;

public class Program

    {

       public static void Main(string[] args)

        {

            var names = new[] { "Nadin", "Adamo", "Mandy", "Madam Adamo", "Jan" };

            FilterVonAdamoUndNadine(names, x => x == "Adamo", x => x == "Nadin");

        }

        private static void FilterVonAdamoUndNadine<T>(IEnumerable<T> quelle, Func<T, bool> kondition, Func<T, bool> kondition2)

        {

            foreach (var item in quelle)

                if (kondition(item))

                    Console.WriteLine(item);

            foreach (var item in quelle)

                if (kondition2(item))

                    Console.WriteLine(item);

        }

    }