System.Xml.XmlConvert.CreateInvalidSurrogatePairException C# (CSharp) Méthode

        internal static Exception CreateInvalidSurrogatePairException(char low, char hi)
        {
            return CreateInvalidSurrogatePairException(low, hi, ExceptionType.ArgumentException);
        }

        private static unsafe byte *EncodeSurrogate(char *pSrc, char *pSrcEnd, byte *pDst)
        {
            int highChar = pSrc[0];

            if (highChar > 0xdbff)
            {
                throw XmlConvert.CreateInvalidHighSurrogateCharException((char)highChar);
            }
            if ((pSrc + 1) >= pSrcEnd)
            {
                throw new ArgumentException(Res.GetString("Xml_InvalidSurrogateMissingLowChar"));
            }
            int lowChar = pSrc[1];

            if (lowChar < 0xdc00)
            {
                throw XmlConvert.CreateInvalidSurrogatePairException((char)lowChar, (char)highChar);
            }
            highChar = XmlCharType.CombineSurrogateChar(lowChar, highChar);
            pDst[0]  = (byte)(240 | (highChar >> 0x12));
            pDst[1]  = (byte)(0x80 | ((highChar >> 12) & 0x3f));
            pDst[2]  = (byte)(0x80 | ((highChar >> 6) & 0x3f));
            pDst[3]  = (byte)(0x80 | (highChar & 0x3f));
            pDst    += 4;
            return(pDst);
        }