What is a cookie ?

Cookie is a piece of information stored in the client computer/Browser which is limited to 4k in size.

Advatanges:-

1.  very simple to implement
2. Browser automatically arranges cookies stored for multiple sites

Disadvantages:-

1. It stores cookie data in simple text format,so its not secure.
2. cookie size limited to 4 kb
3. No. of cookies stored by browser are limited to 20.some allow 300,when a new cookie comes old one will be discarded,

There are 2 types of cookies

• Non-persistent(Temporary) cookies
• Persistent(Permanent) cookies

Non-persistent :- Also called as session cookies or In memory cookies.These are destroyed when you close your browser.

Persistent :-  These are saved as a text file in file system of a clients computer ,Generally under TEMPORARY INTERNET FILES folder .

cookie Expires property must be set to create persistent cookie.
ex:- Remember me option.

Example to create persistent cookie

//create a cookie object

httpcookie cookie1= new httpcookie("userdetails");

//setting values to inside it

cookie1["username"]="naga";
cookie["usercolor"]="green";
cookie["expire"]=" 5 days";

//Adding expire time of cookies

cookie1.expires=DateTime.Now.ADD(5);
response.cookies.Add(cookie1);