ReplaceNotExpectedCharacters, C#

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//Rextester.Program.Main is the entry point for your code. Don't change it.
//Compiler version 4.0.30319.17929 for Microsoft (R) .NET Framework 4.5

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text.RegularExpressions;

namespace Rextester
{
    public class Program
    {
        public static void Main(string[] args)
        {
            Console.WriteLine("========== NOME =========");
            
            var nomeEntrada = "JOÃO	',.- DA SILVA";
            var nomeSaida = "JOÃO DA SILVA";
            var nomeTratado = Utilities.ReplaceNotExpectedCharacters(nomeEntrada, @"[^a-zA-ZàèìòùÀÈÌÒÙáéíóúýÁÉÍÓÚÝâêîôûÂÊÎÔÛãñõÃÑÕäëïöüÿÄËÏÖÜŸçÇ\ ]", " ");
            
            Console.WriteLine("String Original: {0}", nomeEntrada);
            Console.WriteLine("String tratada : {0}", nomeTratado);
            
            Console.WriteLine(nomeTratado == nomeSaida);
            
            Console.WriteLine("========== CNPJ/CPF =========");
            
            var cpfEntrada = "423.489.300-56";
            var cpfSaida = "42348930056";
            var cpfTratado = Utilities.ReplaceNotExpectedCharacters(cpfEntrada, @"[^\d+]", "");
            
            Console.WriteLine("String Original: {0}", cpfEntrada);
            Console.WriteLine("String tratada : {0}", cpfTratado);
            
            Console.WriteLine(cpfTratado == cpfSaida);
            
            Console.WriteLine("========== Date (yyyy-MM-dd) =========");
            
            var dataEntrada = "1988/08/23";
            var dataSaida = "1988-08-23";
            var dataTratado = Utilities.ReplaceNotExpectedCharacters(dataEntrada, @"[^\d+]", "");
            
            dataTratado = dataTratado.Insert(4,"-");
            dataTratado = dataTratado.Insert(7,"-");
            
            Console.WriteLine("String Original: {0}", dataEntrada);
            Console.WriteLine("String tratada : {0}", dataTratado);
            
            Console.WriteLine(dataTratado == dataSaida);
            
            Console.WriteLine("========== Email =========");
            
            var emailEntrada = "joão	'.silva&@xxxbrasil.com";
            var emailSaida = "joao.silva@xxxbrasil.com";
            var emailTratado = Utilities.ReplaceNotExpectedCharacters(emailEntrada, @"[^A-Z0-9._%+-+@]", "");
                        
            Console.WriteLine("String Original: {0}", emailEntrada);
            Console.WriteLine("String tratada : {0}", emailTratado);
            
            Console.WriteLine(emailTratado == emailSaida);
        }
    }
    
    public static class Utilities 
    {
        /// <summary>
        /// Replaces  not expected characters.
        /// </summary>
        /// <param name="text"> The text.</param>
        /// <param name="allowedPattern"> The allowed pattern in Regex format, expect them wrapped in brackets</param>
        /// <param name="replacement"> The replacement.</param>
        /// <returns></returns>
        public static string ReplaceNotExpectedCharacters(this string text, string allowedPattern, string replacement)
        {
            //allowedPattern = allowedPattern.StripBrackets("[", "]");
            //[^ ] at the start of a character class negates it - it matches characters not in the class.
            var result = Regex.Replace(text, allowedPattern, replacement);
            return Regex.Replace(result, "[ ]{2,}", " ").Trim(); //returns result free of negated chars
        }     
    }    
}

Show compiler warnings [ + ] Show input
Compilation time: 0,14 sec, absolute running time: 0,2 sec, cpu time: 0,19 sec, average memory usage: 20 Mb, average nr of threads: 4, absolute service time: 0,37 sec