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

        private void ProcessWrite(byte[] buffer, int offset, int count, AsyncProtocolRequest asyncRequest)
        {
            ValidateParameters(buffer, offset, count);

            if (Interlocked.Exchange(ref _NestedWrite, 1) == 1)
            {
                throw new NotSupportedException(SR.Format(SR.net_io_invalidnestedcall, (asyncRequest != null ? "BeginWrite" : "Write"), "write"));
            }

            bool failed = false;
            try
            {
                StartWriting(buffer, offset, count, asyncRequest);
            }
            catch (Exception e)
            {
                failed = true;
                if (e is IOException)
                {
                    throw;
                }

                throw new IOException(SR.net_io_write, e);
            }
            finally
            {
                if (asyncRequest == null || failed)
                {
                    _NestedWrite = 0;
                }
            }
        }