C#: reading binary file

using System;
using System.IO;
using System.Runtime.Serialization.Formatters.Binary;
namespace FileIOText
{
class ReadBinaryFile
{
const String filename = "binfile.dat";
public ReadBinaryFile()
{
FileStream fs = new FileStream(filename, FileMode.Open, FileAccess.Read);
/*
//create reader
BinaryReader br = new BinaryReader(fs);

Console.WriteLine(br.ReadInt32());
Console.WriteLine(br.ReadDouble());
Console.WriteLine(br.ReadBoolean());
Console.WriteLine(br.ReadString());
Console.WriteLine(br.ReadChar());

br.Close();
*/

BinaryFormatter formatter = new BinaryFormatter();
Dog d = (Dog)formatter.Deserialize(fs);
Console.WriteLine(d.Name);
Console.WriteLine(d.Age);
fs.Close();
}
}
}