System.Net.HttpRequestStream.HttpRequestStreamAsyncResult.IOCompleted C# (CSharp) Method

            private static void IOCompleted(HttpRequestStreamAsyncResult asyncResult, uint errorCode, uint numBytes)
            {
                if (NetEventSource.IsEnabled) NetEventSource.Info(null, $"asyncResult: {asyncResult} errorCode:0x {errorCode.ToString("x8")} numBytes: {numBytes}");
                object result = null;
                try
                {
                    if (errorCode != Interop.HttpApi.ERROR_SUCCESS && errorCode != Interop.HttpApi.ERROR_HANDLE_EOF)
                    {
                        asyncResult.ErrorCode = (int)errorCode;
                        result = new HttpListenerException((int)errorCode);
                    }
                    else
                    {
                        result = numBytes;
                        if (NetEventSource.IsEnabled) NetEventSource.DumpBuffer(asyncResult, (IntPtr)asyncResult._pPinnedBuffer, (int)numBytes);
                    }
                    if (NetEventSource.IsEnabled) NetEventSource.Info(null, $"asyncResult: {asyncResult} calling Complete()");
                }
                catch (Exception e)
                {
                    result = e;
                }
                asyncResult.InvokeCallback(result);
            }