SQL SERVER 2005 : FONCTION DE SUPPRESSION DES ACCENTS DANS UNE CHAÎNE DE CARACTÈRES

using System;
using System.Data;
using System.Data.SqlClient;
using System.Data.SqlTypes;
using Microsoft.SqlServer.Server;
using System.Globalization;
using System.Text;

public partial class UserDefinedFunctions
{
    [Microsoft.SqlServer.Server.SqlFunction]
    public static SqlString RemoveDiacritics(SqlString stArg)
    {

        string stFormD = stArg.ToString().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 (new SqlString(sb.ToString()));

    }
};