private void Initialize(Stream stream, string contentType, XmlDictionaryReaderQuotas quotas, int maxBufferSize)
 {
     string str;
     string str2;
     string str3;
     if (stream == null)
     {
         throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull("stream");
     }
     this.maxBufferSize = maxBufferSize;
     this.bufferRemaining = maxBufferSize;
     if (contentType == null)
     {
         MimeMessageReader reader = new MimeMessageReader(stream);
         MimeHeaders headers = reader.ReadHeaders(this.maxBufferSize, ref this.bufferRemaining);
         this.ReadMessageMimeVersionHeader(headers.MimeVersion);
         this.ReadMessageContentTypeHeader(headers.ContentType, out str, out str2, out str3);
         stream = reader.GetContentStream();
         if (stream == null)
         {
             throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new XmlException(System.Runtime.Serialization.SR.GetString("MtomMessageInvalidContent")));
         }
     }
     else
     {
         this.ReadMessageContentTypeHeader(new ContentTypeHeader(contentType), out str, out str2, out str3);
     }
     this.mimeReader = new MimeReader(stream, str);
     this.mimeParts = null;
     this.readingBinaryElement = false;
     MimePart part = (str2 == null) ? this.ReadRootMimePart() : this.ReadMimePart(this.GetStartUri(str2));
     byte[] buffer = part.GetBuffer(this.maxBufferSize, ref this.bufferRemaining);
     int length = (int) part.Length;
     Encoding encoding = this.ReadRootContentTypeHeader(part.Headers.ContentType, this.encodings, str3);
     this.CheckContentTransferEncodingOnRoot(part.Headers.ContentTransferEncoding);
     IXmlTextReaderInitializer xmlReader = this.xmlReader as IXmlTextReaderInitializer;
     if (xmlReader != null)
     {
         xmlReader.SetInput(buffer, 0, length, encoding, quotas, null);
     }
     else
     {
         this.xmlReader = XmlDictionaryReader.CreateTextReader(buffer, 0, length, encoding, quotas, null);
     }
 }
        void Initialize(Stream stream, string contentType, XmlDictionaryReaderQuotas quotas, int maxBufferSize)
        {
            if (stream == null)
                throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull("stream");

            this.maxBufferSize = maxBufferSize;
            this.bufferRemaining = maxBufferSize;

            string boundary, start, startInfo;

            if (contentType == null)
            {
                MimeMessageReader messageReader = new MimeMessageReader(stream);
                MimeHeaders messageHeaders = messageReader.ReadHeaders(this.maxBufferSize, ref this.bufferRemaining);
                ReadMessageMimeVersionHeader(messageHeaders.MimeVersion);
                ReadMessageContentTypeHeader(messageHeaders.ContentType, out boundary, out start, out startInfo);
                stream = messageReader.GetContentStream();
                if (stream == null)
                    throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new XmlException(SR.GetString(SR.MtomMessageInvalidContent)));
            }
            else
            {
                ReadMessageContentTypeHeader(new ContentTypeHeader(contentType), out boundary, out start, out startInfo);
            }

            this.mimeReader = new MimeReader(stream, boundary);
            this.mimeParts = null;
            this.readingBinaryElement = false;

            MimePart infosetPart = (start == null) ? ReadRootMimePart() : ReadMimePart(GetStartUri(start));
            byte[] infosetBytes = infosetPart.GetBuffer(this.maxBufferSize, ref this.bufferRemaining);
            int infosetByteCount = (int)infosetPart.Length;

            Encoding encoding = ReadRootContentTypeHeader(infosetPart.Headers.ContentType, this.encodings, startInfo);
            CheckContentTransferEncodingOnRoot(infosetPart.Headers.ContentTransferEncoding);

            IXmlTextReaderInitializer initializer = xmlReader as IXmlTextReaderInitializer;

            if (initializer != null)
                initializer.SetInput(infosetBytes, 0, infosetByteCount, encoding, quotas, null);
            else
                xmlReader = XmlDictionaryReader.CreateTextReader(infosetBytes, 0, infosetByteCount, encoding, quotas, null);
        }