RequestSender.cs

 public class RequestSender
    {
        private static HttpClient _CLIENT;

        public RequestSender()
        {
            if (_CLIENT == null)
            {
                _CLIENT = new HttpClient();
                _CLIENT.BaseAddress = new Uri("http://example.com/api/");
            }
        }

        public async Task<string> Get(string path)
        {
            var response = await _client.GetStringAsync(path);
            return response;
        }
    }