Currency converter api

            List<string> currencies = new List<string>();
            var url = "https://api.apilayer.com/exchangerates_data/convert?to=to&from=from&amount=amount";
            var client = new HttpClient();
            client.DefaultRequestHeaders.Add("apikey", "APIKEYHERE");
            var result = await client.SendAsync(new HttpRequestMessage(HttpMethod.Get, url));