replacing non-english symbols with equivalent (removing Diacritics)

namespace Remove {
using System;
using System.Text;
using System.Globalization;
  class Remove {
    [STAThread]
    static void Main(string[] args) {
      foreach(string st in args) {
        Console.WriteLine(RemoveDiacritics(st));
      }
    }

    static string RemoveDiacritics(string stIn) {
      string stFormD = stIn.Normalize(NormalizationForm.FormD);
      StringBuilder sb = new StringBuilder();

      for(int ich = 0; ich < stFormD.Length; ich++) {
        UnicodeCategory uc = CharUnicodeInfo.GetUnicodeCategory(stFormD[ich]);
        if(uc != UnicodeCategory.NonSpacingMark) {
          sb.Append(stFormD[ich]);
        }
      }

      return(sb.ToString().Normalize(NormalizationForm.FormC));
    }
  }
}