public static string convert(string chrstr)
  {
   byte[] array = new byte[2];
   string returnstr="";
   int chrasc=0;
   int i1 = 0;
   int i2 =0;
   char[] nowchar=chrstr.ToCharArray();
   for (int j=0;j<nowchar.Length ;j++)
   {
     array = System.Text.Encoding.Default.GetBytes(nowchar[j].ToString ()); 
    i1 = (short)(array[0] );
    i2 = (short)(array[1] );

<p style=line-height: 150%>    chrasc=i1*256+i2-65536;
    if (chrasc>0 && chrasc<160)
    {
     returnstr+=nowchar[j]+“-”;
    }
    else
    {
     for (int i=(pyvalue.Length -1);i>=0;i--)
     {
      if (pyvalue[i]<=chrasc)
      {
       returnstr+=pystr[i]+“-”;
       break;
      }
     }
    }
   }
   return returnstr;

}
 }