System.Text.EncoderExceptionFallbackBuffer.Fallback C# (CSharp) Метод

        public override bool Fallback(char charUnknownHigh, char charUnknownLow, int index)
        {
            if (!Char.IsHighSurrogate(charUnknownHigh))
            {
                throw new ArgumentOutOfRangeException("charUnknownHigh",
                    Environment.GetResourceString("ArgumentOutOfRange_Range",
                    0xD800, 0xDBFF));
            }
            if (!Char.IsLowSurrogate(charUnknownLow))
            {
                throw new ArgumentOutOfRangeException("CharUnknownLow",
                    Environment.GetResourceString("ArgumentOutOfRange_Range",
                    0xDC00, 0xDFFF));
            }

            int iTemp = Char.ConvertToUtf32(charUnknownHigh, charUnknownLow);

            // Fall back our char
            throw new EncoderFallbackException(
                Environment.GetResourceString("Argument_InvalidCodePageConversionIndex",
                    iTemp, index), charUnknownHigh, charUnknownLow, index);
        }