How to get double quotes around 'name' and 'filename' on Xamarin Monotouch iOS with the HttpClient.

gistfile1.cs

else if (restRequest.ContentType == ContentTypes.MultipartFormData)
                    {
                        var multipartPartFormDataContent = new MultipartFormDataContent();
                        var contentJson = new StringContent(restRequest.GetRequestBody());
                        multipartPartFormDataContent.Add(contentJson);
                        httpRequestMessage.Content = contentJson;

                        if (restRequest.Files.Any())
                            foreach (var fileParameter in restRequest.Files)
                            {
                                var streamContent =
                                    new StreamContent(new MemoryStream(fileParameter.Data, 0, fileParameter.Data.Length));
                                streamContent.Headers.ContentDisposition =
                                    ContentDispositionHeaderValue.Parse("form-data");
                                streamContent.Headers.ContentDisposition.Parameters.Add(new NameValueHeaderValue(
                                                                                            "name",
                                                                                            string.Format("\"{0}\"",
                                                                                                          fileParameter
                                                                                                              .Name)));
                                streamContent.Headers.ContentDisposition.Parameters.Add(
                                    new NameValueHeaderValue("filename",
                                                             string.Format("\"{0}\"", fileParameter.FileName)));

                                multipartPartFormDataContent.Add(streamContent);
                            }

                        httpRequestMessage.Content = multipartPartFormDataContent;
                    }