C # cookie operations

Below is the cookie writing 1 Httpcookie =   New Httpcookie ( " Info " ); // Define the cookie object and the item named info
2 Datetime dt = Datetime. now; // Define time object
3 Timespan TS = New Timespan ( 1 , 0 , 0 , 0 ); // The time when the cookie is valid. For more information, see msdn.
4 Cookie. Expires = DT. Add (TS ); // Add time
5 Cookie. Values. Add ( " User " , " Cxbkkk " ); // Add attribute
6 Cookie. Values. Add ( " Userid " , " 1203 " );
7 Response. appendcookie (cookie ); // Are you sure you want to write in cookie

Read cookie 1 If (Request. Cookies [ " Info " ] ! = Null )
2 {
3 String Temp = Convert. tostring (request. Cookies [ " Info " ]. Values [ " User " ]) + " " + Convert. tostring (request. Cookies [ " Info " ]. Values [ " Userid " ]);
4 // Use request. Cookies ["info"]. value) to read all data)
5 If (Temp = "" )
6 {
7 Response. Write ( " Null " );
8 }
9 Else
10 Response. Write (temp );
11 }
12 Else
13 {
14 Response. Write ( " Error " );
15 }

Modify cookie 1 Response. Cookies [ " Info " ] [ " User " ] =   " 2 " ;
2 Response. Cookies [ " Info " ]. Expires = Datetime. Now. adddays ( 1 );

Delete attributes under a cookie 1 Httpcookie acookie = Request. Cookies [ " Info " ];
2 Acookie. Values. Remove ( " Userid " );
3 Acookie. Expires = Datetime. Now. adddays ( 1 );
4 Response. Cookies. Add (acookie );

To delete all cookies, you can set the expiration time to now. 1 Int Limit = Request. Cookies. Count -   1 ;
2 For ( Int I = 0 ; I < Limit; I ++ )
3 {
4 Acookie = Request. Cookies (I)
5 Acookie. Expires = Datetime. Now. adddays ( - 1 )
6 Response. Cookies. Add (acookie)
7 }