System.Net.Connection.CheckStartReceive C# (CSharp) Method

        internal void CheckStartReceive(HttpWebRequest request)
        {
            lock (this)
            {
                request.HeadersCompleted = true;
                if (m_WriteList.Count == 0)
                {
                    // aborted request, was already dispatched.
                    // Note it could have been aborted softly if not the first one in the pipeline
                    return;
                }

                // Note we do NOT allow receive if pipelining and the passed request is not the first one on the write queue
                if (!m_ReadDone || m_WriteList[0] != (object)request)
                {
                    // ReadStartNextRequest should take care of these cases
                    return;
                }
                // Start a receive
                m_ReadDone = false;
            }

            if (!request.Async)
            {
                GlobalLog.Print("Connection#" + ValidationHelper.HashString(this) + "::CheckStartReceive() SYNC request, calling ConnectionReaderAsyncResult.InvokeCallback()");
                request.ConnectionReaderAsyncResult.InvokeCallback();
            }
            else if (m_BytesScanned < m_BytesRead)
            {
                GlobalLog.Print("Connection#" + ValidationHelper.HashString(this) + "::CheckStartReceive() Calling ReadComplete, bytes unparsed = " + (m_BytesRead - m_BytesScanned));
                ReadComplete(0, WebExceptionStatus.Success);
            }
            else if (Thread.CurrentThread.IsThreadPoolThread)
            {
                GlobalLog.Print("Connection#" + ValidationHelper.HashString(this) + "::CheckStartReceive() Calling PostReceive().");
                PostReceive();
            }
            else
            {
                // Offload to the threadpool to protect against the case where one request's thread posts IO that another request
                // depends on, but the first thread dies in the mean time.
                GlobalLog.Print("Connection#" + ValidationHelper.HashString(this) + "::CheckStartReceive() ThreadPool.UnsafeQueueUserWorkItem(m_PostReceiveDelegate, this)");
                ThreadPool.UnsafeQueueUserWorkItem(m_PostReceiveDelegate, this);
            }
        }