4 Ways declaring bool parameter , the last one is for c#3.0

this reference from msdn blog

using System;

using System.Collections.Generic;

using System.Text;

using System.IO;

namespace ConsoleApplication1

{

class Program

{

[Flags]

enum DisplayUserOptions

{

Email = 0x1,

PhoneNumber = 0x2,

Both = (Email | PhoneNumber),

}

static void Main(string[] args)

{

User user=new User();

TextWriter stream=null;

//cara 1

DisplayUser1(user, Console.Out, true /*displayEmail*/, false /*displayPhoneNumber*/);

//cara 2

DisplayUser2(user, stream, DisplayUserOptions.Email);

//cara 3

//More readable but much more verbose(panjang kata2nya)

DisplayUserOption options = new DisplayUserOption();

options.Email = true;

options.PhoneNumber = false;

DisplayUser3(user, stream,options);

//Cara 4 di C#3.0 bisa pake object initializers

DisplayUser3(user, Console.Out, new DisplayUserOption { Email = true, PhoneNumber = false });

}

static void DisplayUser1(User user, TextWriter stream, bool displayEmail, bool displayPhoneNumber)

{

}

static void DisplayUser2(User user, TextWriter stream, DisplayUserOptions options)

{ }

static void DisplayUser3(User user, TextWriter stream, DisplayUserOption options)

{ }

}

class User

{ }

struct DisplayUserOption

{

public bool Email;

public bool PhoneNumber;

}

}