Linq join to tables, C#

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//Rextester.Program.Main is the entry point for your code. Don't change it.
//Compiler version 4.0.30319.17929 for Microsoft (R) .NET Framework 4.5

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text.RegularExpressions;

namespace Rextester
{
    public class Customer
    {
        public int ID { get; set; }
        public string Name { get; set; }
    }

public class Order
    {
        public int ID { get; set; }
        public string Product { get; set; }
    }
    
    public class Program
    {
        public static void Main(string[] args)
        {
                // Example customers.
            var customers = new Customer[]
            {
                new Customer{ID = 5, Name = "Sam"},
                new Customer{ID = 6, Name = "Dave"},
                new Customer{ID = 7, Name = "Julia"},
                new Customer{ID = 8, Name = "Sue"}
            };
    
            // Example orders.
            var orders = new Order[]
            {
                new Order{ID = 5, Product = "Book"},
                new Order{ID = 6, Product = "Game"},
                new Order{ID = 7, Product = "Computer"},
                new Order{ID = 8, Product = "Shirt"}
            };
    
            // Join on the ID properties.
            var query = from c in customers
                        join o in orders on c.ID equals o.ID
                        select new { c.Name, o.Product };
    
            // Display joined groups.
            foreach (var group in query)
            {
                Console.WriteLine("{0} bought {1}", group.Name, group.Product);
            }
        }
    }
}

Show compiler warnings [ + ] Show input
Compilation time: 0,16 sec, absolute running time: 0,13 sec, cpu time: 0,11 sec, average memory usage: 14 Mb, average nr of threads: 3