Pihrtsoft.Text.RegularExpressions.Linq.PatternBuilder.AppendUnicodeHexadecimal C# (CSharp) Метод

        internal void AppendUnicodeHexadecimal(int charCode)
        {
            if (charCode < 0 || charCode > 0xFFFF)
                throw new ArgumentOutOfRangeException(nameof(charCode));

            AppendBackslash('u');
            AppendDirect(charCode.ToString("X4", CultureInfo.InvariantCulture).PadLeft(4, '0'));
        }