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

        private static void WriteCallback(IAsyncResult transportResult)
        {
            if (transportResult.CompletedSynchronously)
            {
                return;
            }

            if (!(transportResult.AsyncState is AsyncProtocolRequest))
            {
                NetEventSource.Fail(transportResult, "State type is wrong, expected AsyncProtocolRequest.");
            }

            AsyncProtocolRequest asyncRequest = (AsyncProtocolRequest)transportResult.AsyncState;

            try
            {
                NegotiateStream negoStream = (NegotiateStream)asyncRequest.AsyncObject;
                negoStream.InnerStream.EndWrite(transportResult);
                if (asyncRequest.Count == 0)
                {
                    // This was the last chunk.
                    asyncRequest.Count = -1;
                }

                negoStream.StartWriting(asyncRequest.Buffer, asyncRequest.Offset, asyncRequest.Count, asyncRequest);
            }
            catch (Exception e)
            {
                if (asyncRequest.IsUserCompleted)
                {
                    // This will throw on a worker thread.
                    throw;
                }

                asyncRequest.CompleteUserWithError(e);
            }
        }