Represents the event code indicating that the view-state verification failed. This field is constant.
Value: 4009
WebEventCodes.AuditInvalidViewStateFailure is the major code for the health event related to view-state verification failure. When this event occurs, ASP.NET raises a System.Web.Management.WebViewStateFailureAuditEvent with a major code of WebEventCodes.AuditInvalidViewStateFailure.