FormsAuthentication « Authentication Authorization « ASP.NET Tutorial

21.10.1.Configuring Forms Authentication
21.10.2.Use the web configuration file to change the name of the authentication cookie.
21.10.3.Using Cookieless Forms Authentication
21.10.4.Using Sliding Expiration with Forms Authentication
21.10.5.Set user name with FormsAuthentication.SetAuthCookie
21.10.6.Validate a user with FormsAuthentication.Authenticate
21.10.7.Using Forms Authentication Across Domains: Query String Authenticate
21.10.8.Web configuration file contains a list of usernames and passwords.
21.10.9.Assigning a name to the user and accessing next pages

21.10.10.Principal Login