使用FubarCoder.RestSharp.Portable设置HttpClientHander.set_AutomaticDecompression

Question

我有以下方法，当运行时导致MissingMethodException方法（＆＃39; System.Net.Http.HttpClientHandler.set_AutomaticDecompression＆＃39; not found）

    public async Task<TokenResponseModel> Login (string username, string password)
    {
       var tokenResponse = new TokenResponseModel ();
        try {
            var request = new RestRequest (Method.POST);
            request.AddParameter ("username", username);
            request.AddParameter ("password", password);
            request.AddParameter ("grant_type", "password");
            request.AddHeader ("Accept", "application/json");
            using (var client = new RestClient (GetStringRequest ("Token"))) {
                var json = await client.Execute<TokenResponseModel> (request);
                tokenResponse = JsonConvert.DeserializeObject<TokenResponseModel> (json.Content);
            }
            return tokenResponse;
        } catch (Exception e) {
            Debug.WriteLine ("Exception thrown - {0}--{1}", e.Message, e.InnerException);
            return tokenResponse;
        }
    }

我知道我可以使用ClientHandler设置AutomaticDecompression，但我似乎找到了将ClientHandler连接到RestClient的方法。有没有办法可以直接将ClientHandler连接到RestClient，还是RestSharp.Portable可以自行设置AutomaticDecompression？