using System;

using System.Text;

using System.Globalization;

​

public class Program

{

    public static void Main()

    {

    string s = "C.A.B.Á. de la pampa";

    string normalized = s.Normalize(NormalizationForm.FormD);

​

​

    StringBuilder resultBuilder = new StringBuilder();

    foreach (var character in normalized)

    {

        UnicodeCategory category = CharUnicodeInfo.GetUnicodeCategory(character);

        if (category == UnicodeCategory.LowercaseLetter

            || category == UnicodeCategory.UppercaseLetter

            || category == UnicodeCategory.SpaceSeparator)

            resultBuilder.Append(character);

            Console.WriteLine(character);

        Console.WriteLine(category);

    }

        Console.Write(resultBuilder.ToString());

​

    }

}