ดีบักตัวกรอง LINQ

using System;
using System.Linq;
class Program
{
    static bool IsPassing(int score) => score >= 70;
    static void Main()
    {
        int[] scores = { 69, 70, 71 };
        var passing = scores.Where(IsPassing);
        Console.WriteLine(string.Join(", ", passing));
    }
}