Join orders with customers

using System;
using System.Linq;

class Program
{
    static void Main()
    {
        var customers = new[] { new { Id = 1, Name = "Ali" }, new { Id = 2, Name = "Sara" } };
        var orders = new[] { new { CustomerId = 1, Amount = 100 }, new { CustomerId = 2, Amount = 200 } };
        var result = from o in orders
                     join c in customers on o.CustomerId equals c.Id
                     select $"{c.Name}: {o.Amount}";
        Console.WriteLine(string.Join("\n", result));
    }
}