System.Xml.XmlBufferReader.GetEscapedChars C# (CSharp) Méthode

        public int GetEscapedChars(int offset, int length, char[] chars)
        {
            byte[] buffer = _buffer;
            int charCount = 0;
            int textOffset = offset;
            int offsetMax = offset + length;
            while (true)
            {
                while (offset < offsetMax && IsAttrChar(buffer[offset]))
                    offset++;
                charCount += GetChars(textOffset, offset - textOffset, chars, charCount);
                if (offset == offsetMax)
                    break;
                textOffset = offset;
                if (buffer[offset] == '&')
                {
                    while (offset < offsetMax && buffer[offset] != ';')
                        offset++;
                    offset++;
                    int ch = GetCharEntity(textOffset, offset - textOffset);
                    textOffset = offset;
                    if (ch > char.MaxValue)
                    {
                        SurrogateChar surrogate = new SurrogateChar(ch);
                        chars[charCount++] = surrogate.HighChar;
                        chars[charCount++] = surrogate.LowChar;
                    }
                    else
                    {
                        chars[charCount++] = (char)ch;
                    }
                }
                else if (buffer[offset] == '\n' || buffer[offset] == '\t')
                {
                    chars[charCount++] = ' ';
                    offset++;
                    textOffset = offset;
                }
                else // '\r'
                {
                    chars[charCount++] = ' ';
                    offset++;

                    if (offset < offsetMax && buffer[offset] == '\n')
                        offset++;

                    textOffset = offset;
                }
            }
            return charCount;
        }