using System;

using System.Net.Http;

using System.Threading.Tasks;

using Newtonsoft.Json;

​

namespace ConversorDolar

{

    class Program

    {

        static async Task Main()

        {

            Console.WriteLine("Digite o valor em dólares: ");

            if (double.TryParse(Console.ReadLine(), out double valorDolar))

            {

                string url = "https://economia.awesomeapi.com.br/json/last/USD-BRL";

                using (HttpClient client = new HttpClient())

                {

                    HttpResponseMessage response = await client.GetAsync(url);

                    response.EnsureSuccessStatusCode();

                    string responseBody = await response.Content.ReadAsStringAsync();

​

                    dynamic cotacao = JsonConvert.DeserializeObject(responseBody);

​

                    double cotacaoDolar = (double)cotacao.USDBRL.bid;

​

                    double valorReal = valorDolar * cotacaoDolar;

​

                    Console.WriteLine($"O valor em reais é: R$ {valorReal:F2}");

                }

            }

            else

            {

                Console.WriteLine("Valor inválido.");

            }

        }

    }

}