Fan.Sys.FanStr.isAlpha C# (CSharp) Method

        public static bool isAlpha(string self)
        {
            int len = self.Length;
              for (int i=0; i<len; ++i)
              {
            int ch = self[i];
            if (ch >= 128 || (FanInt.charMap[ch] & FanInt.ALPHA) == 0)
              return false;
              }
              return true;
        }