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using System;
using System.Collections.Generic;
using System.Data.Entity;
using System.Diagnostics;
using System.IO;
using System.Linq;
using System.Threading;
using System.Threading.Tasks;

namespace ConsoleApplication1

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private static bool IsValidCNPJ(string cnpj)
{
    var mul1 = new[] {5, 4, 3, 2, 9, 8, 7, 6, 5, 4, 3, 2};
    var mul2 = new[] {6, 5, 4, 3, 2, 9, 8, 7, 6, 5, 4, 3, 2};
    var cpnjWithoutCheckDigit = cnpj.Substring(0, 12);
    var sum = 0;
    for (var i = 0; i < 12; i++)
        sum += int.Parse(cpnjWithoutCheckDigit[i].ToString())*mul1[i];

    var rest = sum % 11;

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public static string Mod11(string pis)
{
    var sum = 0;
    var fat = 2;
    for (var i = pis.Length-1; i >= 0; i--)
    {
        sum += Convert.ToInt32(pis[i].ToString()) * fat;
        fat++;
        if (fat > 9)
            fat = 2;

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using System;
using System.Reflection.Emit;

namespace GerandoCodigoEmExecucao
{
    class Program
    {
        static void Main(string[] args)
        {
            Func<int, int, int> soma = Soma;

AlbertoMonteiro

using System.Data.SqlClient;
using Microsoft.SqlServer.Management.Common;
using Microsoft.SqlServer.Management.Smo;

namespace ConsoleApplication9
{
    class Program
    {
        static void Main(string[] args)
        {

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using System;

namespace ConsoleApplication2
{
    public class ExceptionCSharp5 : Exception
    {
        public ExceptionCSharp5()
            : base("Mensagem")
        { }
    }

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var type = typeof(Teste);

var assemblyName = new AssemblyName("TesteNamespace");
var assemblyBuilder = AppDomain.CurrentDomain.DefineDynamicAssembly(assemblyName, AssemblyBuilderAccess.Run);
var moduleBuilder = assemblyBuilder.DefineDynamicModule(assemblyName.Name);
var typeBuilder = moduleBuilder.DefineType("TesteNamespace." + type.Name + "Proxy", TypeAttributes.Public, type);

var jsonIgnoreType = typeof(JsonIgnoreAttribute);
var constructorInfo = jsonIgnoreType.GetConstructor(Type.EmptyTypes);
var attributeBuilder = new CustomAttributeBuilder(constructorInfo, Type.EmptyTypes);

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^(?([\d.-]{11})(\d{3}\.){2}\d{3}-\d{2}|\d{2}(\.\d{3}){2}/\d{4}-\d{2})$

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public enum Operações
{
	Soma = 1,
	Subtração,
	Multiplicação,
	Divisão
}

var type = typeof(Operações);
var todasOperações = Enum.GetNames(type).Select(n => new { Name = n, Value = (int)Enum.Parse(type,n) });

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using System.Data.Entity;
using System.Data.Entity.ModelConfiguration.Conventions;

namespace ConsoleApplication2
{
    class Program
    {
        static void Main(string[] args)
        {
            using (var ctx = new Ctx())