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

        public int GetCharEntity(int offset, int length)
        {
            if (length < 3)
                XmlExceptionHelper.ThrowInvalidCharRef(_reader);
            byte[] buffer = _buffer;
            DiagnosticUtility.DebugAssert(buffer[offset] == '&', "");
            DiagnosticUtility.DebugAssert(buffer[offset + length - 1] == ';', "");
            switch (buffer[offset + 1])
            {
                case (byte)'l':
                    return GetLessThanCharEntity(offset, length);
                case (byte)'g':
                    return GetGreaterThanCharEntity(offset, length);
                case (byte)'a':
                    if (buffer[offset + 2] == (byte)'m')
                        return GetAmpersandCharEntity(offset, length);
                    else
                        return GetApostropheCharEntity(offset, length);
                case (byte)'q':
                    return GetQuoteCharEntity(offset, length);
                case (byte)'#':
                    if (buffer[offset + 2] == (byte)'x')
                        return GetHexCharEntity(offset, length);
                    else
                        return GetDecimalCharEntity(offset, length);
                default:
                    XmlExceptionHelper.ThrowInvalidCharRef(_reader);
                    return 0;
            }
        }