NuGet.MultipartWebRequest.AddFile C# (CSharp) Method

        public void AddFile(Func<Stream> fileFactory, string fieldName, string contentType = "application/octet-stream")
        {
            _files.Add(new PostFileData { FileFactory = fileFactory, FieldName = fieldName, ContentType = contentType });
        }

        /// <summary>
        /// Pushes a package to the server that is represented by the stream.
        /// </summary>
        /// <param name="apiKey">API key to be used to push the package.</param>
        /// <param name="packageStreamFactory">A delegate which can be used to open a stream for the package file.</param>
        /// <param name="timeout">Time in milliseconds to timeout the server request.</param>
        public void PushPackage(string apiKey, Func <Stream> packageStreamFactory, int timeout)
        {
            HttpClient client = GetClient("", "PUT", "application/octet-stream");

            client.SendingRequest += (sender, e) =>
            {
                var request = (HttpWebRequest)e.Request;

                // Set the timeout
                if (timeout <= 0)
                {
                    timeout = request.ReadWriteTimeout; // Default to 5 minutes if the value is invalid.
                }

                request.Timeout          = timeout;
                request.ReadWriteTimeout = timeout;
                if (!String.IsNullOrEmpty(apiKey))
                {
                    request.Headers.Add(ApiKeyHeader, apiKey);
                }

                var multiPartRequest = new MultipartWebRequest();
                multiPartRequest.AddFile(packageStreamFactory, "package");

                multiPartRequest.CreateMultipartRequest(request);
            };

            EnsureSuccessfulResponse(client, HttpStatusCode.Created);
        }