System.Net.WebRequest.EndGetRequestStream C# (CSharp) Method

        public virtual System.IO.Stream EndGetRequestStream(System.IAsyncResult asyncResult) { throw null; }
        public virtual System.Net.WebResponse EndGetResponse(System.IAsyncResult asyncResult) { throw null; }

        private void OpenWriteAsyncCallback(IAsyncResult result)
        {
            Stream    stream = null;
            Exception ex     = null;
            bool      cancel = false;
            InternalWebRequestStreamWrapper internal_stream;

            try {
                stream                        = request.EndGetRequestStream(result);
                internal_stream               = (InternalWebRequestStreamWrapper)stream;
                internal_stream.WebClient     = this;
                internal_stream.WebClientData = callback_data;
            }
            catch (WebException web) {
                cancel = (web.Status == WebExceptionStatus.RequestCanceled);
                ex     = web;
            }
            catch (Exception e) {
                ex = e;
            }
            finally {
                callback_data.sync_context.Post(delegate(object sender) {
                    OnOpenWriteCompleted(new OpenWriteCompletedEventArgs(stream, ex, cancel, callback_data.user_token));
                }, null);
            }
        }