using System;

public class Program

{

    public static void Main()

    {

        var path = @"c:\teste\senão\término\um path com textão.txt";

        var pathD = path.Normalize(System.Text.NormalizationForm.FormD);

        Console.WriteLine(string.Concat(" path=", path));

        Console.WriteLine(string.Concat("pathD=", pathD));

        Console.WriteLine(string.Concat("path == pathD ? ", path==pathD));

    }

}