using System;

using System.Linq;

​

public class Program

{

    public record Person(string Name, int Age);

    public static void Main()

    {

        Person[] people={new Person("anna", 11),new Person("bea", 22),new Person("cath", 33),new Person("dave", 44),new Person("egg", 55),new Person("fred", 66)};

        Console.WriteLine( "{0}", String.Join<Person>(" ", people) ) ; 

        //query syntax, preferred by MS, as many find it easier...

        var oldies= from person in people

                    where person.Age > 60

                    select person;

        Console.WriteLine( "{0}", String.Join(" ", oldies) ) ;      

​

        //method syntax

        var notSoOld=people.Where(p => p.Age > 50 && p.Age < 60);

        Console.WriteLine( "{0}", String.Join(" ", notSoOld) ) ;        

​

    }

}

​