https://learn.microsoft.com/en-us/dotnet/api/system.web.ui.webcontrols.loginview?view=netframework-4.8.1&redirectedfrom=MSDN
LoginView Class (System.Web.UI.WebControls) | Microsoft Learn
Displays the appropriate content template for a given user, based on the user's authentication status and role membership.
class systemweb uiloginviewmicrosoftlearn