FormsAuthentication.SetAuthCookie Method (String, Boolean)
Creates an authentication ticket for the supplied user name and adds it to the cookies collection of the response, or to the URL if you are using cookieless authentication.
Assembly: System.Web (in System.Web.dll)
public static void SetAuthCookie( string userName, bool createPersistentCookie )
The SetAuthCookie method adds a forms-authentication ticket to either the cookies collection, or to the URL if CookiesSupported is false. The forms-authentication ticket supplies forms-authentication information to the next request made by the browser. With forms authentication, you can use the SetAuthCookie method when you want to authenticate a user but still retain control of the navigation with redirects.