Yamool.CWSharp.RewindStringReader.Normalize C# (CSharp) Метод

        private char Normalize(char ch)
        {
            if (ch.IsUpperCase())
            {
                //convert a upper letter to lower.
                ch = (char)((int)ch + 32);
            }
            else if (ch >= 0xff01 && ch <= 0xff5d)
            {
                //convert a fullwidth char to halfwidth.
                ch = (char)((int)ch - 0xFEE0);
            }
            return ch;
        }