using System;

using System.Threading.Tasks;

public class Program

{

    public static async Task Main()

    {

        var client = new Gw2Sharp.Gw2Client();

        var result = await client.WebApi.V2.Items.ManyAsync(new[] { 27734, 84731, 1778   });

        foreach (var item in result)

            Console.WriteLine($"{item.Id}: {item.Name}");

    }

}