What is HttpCookie Class in C#?

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ICSM Computer · Answer

The HttpCookie class in ASP.NET (System.Web) is used to create, read, and manage cookies — small pieces of data stored on the client’s browser. Cookies are commonly used for storing user preferences, authentication tokens, session identifiers, or any small data that needs to persist between requests. Namespace and Assembly Difinition This class represents an individual cookie — a name-value pair optionally with metadata like expiration date, path, domain, and security settings. Constructors HttpCookie(String, String) Creates, names, and assigns a value to a new cookie. HttpCookie(String) Creates and names a new cookie. Common Properties Property Description Name The name of the cookie (required) Value The string value stored in the cookie Expires Sets the expiration date (otherwise it's a session cookie) Domain Specifies the domain the cookie is valid for Path Specifies the path the cookie is valid for Secure If true, the cookie is sent only over HTTPS HttpOnly If true, JavaScript cannot access the cookie Values A collection of key-value pairs inside the cookie Creating and Sending a Cookie to the Browser Reading a Cookie This reads the cookie from the user's browser on the next request. Deleting a Cookie You "delete" a cookie by setting its expiration date in the past: Security Notes Set HttpOnly = true to prevent client-side JavaScript from accessing cookies.Use Secure = true for HTTPS-only cookies.Cookies can be intercepted if not encrypted — don’t store sensitive data unless encrypted. Session vs Persistent Cookie Type Behavior Session cookie No Expires set — deleted when the browser closes Persistent cookie Expires set — stored until expiration Example Scenario: Remember User's Language Preference

Property	Description
`Name`	The name of the cookie (required)
`Value`	The string value stored in the cookie
`Expires`	Sets the expiration date (otherwise it's a session cookie)
`Domain`	Specifies the domain the cookie is valid for
`Path`	Specifies the path the cookie is valid for
`Secure`	If `true`, the cookie is sent only over HTTPS
`HttpOnly`	If `true`, JavaScript cannot access the cookie
`Values`	A collection of key-value pairs inside the cookie

Type	Behavior
Session cookie	No `Expires` set — deleted when the browser closes
Persistent cookie	`Expires` set — stored until expiration

HttpCookie(String, String)	Creates, names, and assigns a value to a new cookie.
HttpCookie(String)	Creates and names a new cookie.

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What is HttpCookie Class in C#?

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Namespace and Assembly

Difinition

Constructors

Common Properties

Creating and Sending a Cookie to the Browser

Reading a Cookie

Deleting a Cookie

Security Notes

Session vs Persistent Cookie

Example Scenario: Remember User's Language Preference