using System;

using System.Linq;

using System.Text;

using System.Globalization;

//using static System.Text.Encoding;

​

public class Program

{

    public static void Main()

    {

        string accentedText = "Você está numa situação lamentável";

        Console.WriteLine(accentedText);

        Console.WriteLine(accentedText.RemoveDiacritics());

        Encoding.RegisterProvider(CodePagesEncodingProvider.Instance);

        Console.WriteLine(accentedText.RemoveAcentuationThroughGreek());

    }   

}

// https://stackoverflow.com/questions/249087/how-do-i-remove-diacritics-accents-from-a-string-in-net/56797567#56797567

// namespace here

public static class Utility

{

    public static void PrintEncodings(){

         // Print the header.

      Console.Write( "Info.CodePage      " );

      Console.Write( "Info.Name                    " );

      Console.Write( "Info.DisplayName" );

      Console.WriteLine();

      foreach( EncodingInfo ei in Encoding.GetEncodings() )  {

    // Display the EncodingInfo names for every encoding, and compare with the equivalent Encoding names.

         Encoding e = ei.GetEncoding();

​

         Console.Write( "{0,-15}", ei.CodePage );

         if ( ei.CodePage == e.CodePage )

            Console.Write( "    " );

         else

            Console.Write( "*** " );

​

         Console.Write( "{0,-25}", ei.Name );

         if ( ei.CodePage == e.CodePage )

            Console.Write( "    " );

         else

            Console.Write( "*** " );

​

         Console.Write( "{0,-25}", ei.DisplayName );

         if ( ei.CodePage == e.CodePage )

            Console.Write( "    " );

         else

            Console.Write( "*** " );

​

         Console.WriteLine();

      }

    }

    public static string RemoveDiacritics(this string str)

    {

        if (null == str) return null;

        var chars =

            from c in str.Normalize(NormalizationForm.FormD).ToCharArray()

            let uc = CharUnicodeInfo.GetUnicodeCategory(c)

            where uc != UnicodeCategory.NonSpacingMark

            select c;

​

        var cleanStr = new string(chars.ToArray()).Normalize(NormalizationForm.FormC);

​

        return cleanStr;

    }

​

    // or, alternatively

    public static string RemoveDiacritics2(this string str)

    {

        if (null == str) return null;

        var chars = str

            .Normalize(NormalizationForm.FormD)

            .ToCharArray()

            .Where(c=> CharUnicodeInfo.GetUnicodeCategory(c) != UnicodeCategory.NonSpacingMark)

            .ToArray();

​

        return new string(chars).Normalize(NormalizationForm.FormC);

    }

    public static string RemoveAcentuationThroughGreek(this string text)

{

        //fiddle does not have this encoding...

    return

        System.Web.HttpUtility.UrlDecode(

            System.Web.HttpUtility.UrlEncode(

                text, Encoding.GetEncoding("iso-8859-7")));

}

}