RemoveDiacritics.cs

using System;
using System.Globalization;
using System.Text;

namespace TC
{
  // Removes diacritics from a string
  //
  // Original version by Michael Kaplan: 
  // -> http://blogs.msdn.com/b/michkap/archive/2007/05/14/2629747.aspx
  //
  // Optimized version by Tommy Carlier:
  // -> http://blog.tcx.be/2011/11/recently-i-had-to-write-function-that.html
  public static class DiacriticsRemover
  {
    public static string RemoveDiacritics(this string text)
    {
      if (text == null) throw new ArgumentNullException("text");

      if (text.Length > 0)
      {
        char[] chars = new char[text.Length];
        int charIndex = 0;

        text = text.Normalize(NormalizationForm.FormD);
        for (int i = 0; i < text.Length; i++)
        {
          char c = text[i];
          if (CharUnicodeInfo.GetUnicodeCategory(c) != UnicodeCategory.NonSpacingMark)
            chars[charIndex++] = c;
        }

        return new string(chars, 0, charIndex).Normalize(NormalizationForm.FormC);
      }

      return text;
    }
  }
}