System.Net.Security.NegotiateStream.ReadCallback C# (CSharp) Method

        private static void ReadCallback(AsyncProtocolRequest asyncRequest)
        {
            // Async ONLY completion.
            try
            {
                NegotiateStream negoStream = (NegotiateStream)asyncRequest.AsyncObject;
                BufferAsyncResult bufferResult = (BufferAsyncResult)asyncRequest.UserAsyncResult;

                // This is an optimization to avoid an additional callback.
                if ((object)asyncRequest.Buffer == (object)negoStream._ReadHeader)
                {
                    negoStream.StartFrameBody(asyncRequest.Result, bufferResult.Buffer, bufferResult.Offset, bufferResult.Count, asyncRequest);
                }
                else
                {
                    if (-1 == negoStream.ProcessFrameBody(asyncRequest.Result, bufferResult.Buffer, bufferResult.Offset, bufferResult.Count, asyncRequest))
                    {
                        // In case we decrypted 0 bytes, start another reading.
                        negoStream.StartReading(bufferResult.Buffer, bufferResult.Offset, bufferResult.Count, asyncRequest);
                    }
                }
            }
            catch (Exception e)
            {
                if (asyncRequest.IsUserCompleted)
                {
                    // This will throw on a worker thread.
                    throw;
                }

                asyncRequest.CompleteUserWithError(e);
            }
        }
    }