System.Xml.XmlUTF8TextReader.Read C# (CSharp) Méthode

        public override bool Read()
        {
            if (this.Node.ReadState == ReadState.Closed)
                return false;

            if (this.Node.CanMoveToElement)
            {
                // If we're positioned on an attribute or attribute text on an empty element, we need to move back
                // to the element in order to get the correct setting of ExitScope
                MoveToElement();
            }

            if (this.Node.ExitScope)
            {
                ExitScope();
            }
            if (!_buffered)
                BufferReader.SetWindow(ElementNode.BufferOffset, _maxBytesPerRead);

            if (BufferReader.EndOfFile)
            {
                MoveToEndOfFile();
                return false;
            }
            byte ch = BufferReader.GetByte();
            if (ch == (byte)'<')
            {
                BufferReader.SkipByte();
                ch = BufferReader.GetByte();
                if (ch == (byte)'/')
                    ReadEndElement();
                else if (ch == (byte)'!')
                {
                    BufferReader.SkipByte();
                    ch = BufferReader.GetByte();
                    if (ch == '-')
                    {
                        ReadComment();
                    }
                    else
                    {
                        if (OutsideRootElement)
                            XmlExceptionHelper.ThrowXmlException(this, new XmlException(SR.Format(SR.XmlCDATAInvalidAtTopLevel)));

                        ReadCData();
                    }
                }
                else if (ch == (byte)'?')
                    ReadDeclaration();
                else
                    ReadStartElement();
            }
            else if ((s_charType[ch] & CharType.SpecialWhitespace) != 0)
            {
                ReadWhitespace();
            }
            else if (OutsideRootElement && ch != '\r')
            {
                XmlExceptionHelper.ThrowInvalidRootData(this);
            }
            else if ((s_charType[ch] & CharType.Text) != 0)
            {
                ReadText(false);
            }
            else if (ch == '&')
            {
                ReadEscapedText();
            }
            else if (ch == '\r')
            {
                BufferReader.SkipByte();

                if (!BufferReader.EndOfFile && BufferReader.GetByte() == '\n')
                    ReadWhitespace();
                else
                    MoveToComplexText().Value.SetCharValue('\n');
            }
            else if (ch == ']')
            {
                int offset;
                byte[] buffer = BufferReader.GetBuffer(3, out offset);
                if (buffer[offset + 0] == (byte)']' &&
                    buffer[offset + 1] == (byte)']' &&
                    buffer[offset + 2] == (byte)'>')
                {
                    XmlExceptionHelper.ThrowXmlException(this, new XmlException(SR.Format(SR.XmlCloseCData)));
                }

                BufferReader.SkipByte();
                MoveToComplexText().Value.SetCharValue(']');  // Need to get past the ']' and keep going.
            }
            else if (ch == 0xEF)  // Watch for invalid characters 0xfffe and 0xffff
            {
                ReadText(true);
            }
            else
            {
                XmlExceptionHelper.ThrowInvalidXml(this, ch);
            }
            return true;
        }