using System;

using System.Linq;

public class Program

{

    public static void Main()

    {

        string[] vegetables = new[]

        {

            "broccoli",

            "leek",

            "carrot",

        };

        foreach ((string vegetable, int index) in vegetables.Select((vegetable, index) => (vegetable, index)))

        {

            Console.WriteLine($"index: {index}, vegetable '{vegetable}'");

        }

    }

}

​