System.Text.Utf16.Utf16LittleEndianEncoder.TryDecodeCodePointFromString C# (CSharp) Метод

        public static bool TryDecodeCodePointFromString(string s, int index, out UnicodeCodePoint codePoint, out int encodedChars)
        {
            if (index < 0 || index >= s.Length)
            {
                codePoint = default(UnicodeCodePoint);
                encodedChars = 0;
                return false;
            }

            if (index == s.Length - 1 && char.IsSurrogate(s[index]))
            {
                codePoint = default(UnicodeCodePoint);
                encodedChars = 0;
                return false;
            }

            encodedChars = char.IsHighSurrogate(s[index]) ? 2 : 1;
            codePoint = (UnicodeCodePoint)(unchecked((uint)char.ConvertToUtf32(s, index)));

            return true;
        }
    }