Occurs when user credentials are being validated.
Assembly: System.Web.Extensions (in System.Web.Extensions.dll)
The following example shows how to bind an event handler for the event in the Application_Start method of the Global.asax file.
The following example shows an event handler for the event in the Global.asax file. The event handler reads two authentication values from the CustomCredential property and passes them together with the user name and password to a custom authentication class named StudentAuthentication.