ASP.NET includes two intrinsic cookie collections. The collection accessed through the HttpRequest.Cookies collection of System.Web.HttpRequest contains cookies transmitted by the client to the server in the Cookie header. The collection accessed through the HttpResponse.Cookies collection of System.Web.HttpResponse contains new cookies created on the server and transmitted to the client in the Set-Cookie header.

After you add a cookie by using the HttpResponse.Cookies collection, the cookie is immediately available in the HttpRequest.Cookies collection, even if the response has not been sent to the client.

Namespace: System.Web
Assembly: System.Web (in System.Web.dll)
Assembly Versions: 1.0.5000.0, 2.0.0.0