rdakar

public class CpfCnpjUtils {
    private static final int[] pesoCPF = {11, 10, 9, 8, 7, 6, 5, 4, 3, 2};
    private static final int[] pesoCNPJ = {6, 5, 4, 3, 2, 9, 8, 7, 6, 5, 4, 3, 2};

    public static boolean isValid(String cpfCnpj) {
        return (isValidCPF(cpfCnpj) || isValidCNPJ(cpfCnpj));
    }

    private static int calcularDigito(String str, int[] peso) {
        int soma = 0;

rdakar

namespace CpfCnpj
{
    public static class CpfCnpjUtils
    {
        public static bool IsValid(string cpfCnpj)
        {
            return (IsCpf(cpfCnpj) || IsCnpj(cpfCnpj));
        }

        private static bool IsCpf(string cpf)

rdakar

public static T GetEnumValue<T>(this string description)
{
	var type = typeof(T);
	if (!type.GetTypeInfo().IsEnum)
		throw new ArgumentException();
	
	var field = type.GetFields().SelectMany(f => f.GetCustomAttributes(typeof(DescriptionAttribute), false), (f, a) => new { Field = f, Att = a })
								.Where(a => ((DescriptionAttribute)a.Att).Description == description).SingleOrDefault();
	return field == null ? default(T) : (T)field.Field.GetRawConstantValue();
}

rdakar

public static string GetDescription(this Enum enumerationValue)
{
    Type type = enumerationValue.GetType();
    MemberInfo member = type.GetMembers().Where(w => w.Name == Enum.GetName(type, enumerationValue)).FirstOrDefault();
    var attribute = member?.GetCustomAttributes(typeof(DescriptionAttribute), false).FirstOrDefault() as DescriptionAttribute;
    return attribute?.Description != null ? attribute.Description : enumerationValue.ToString();
}