Represents the event code indicating that the supplied view state is invalid. This field is constant.
Value: 50204
WebEventCodes.InvalidViewState is the detail code that specifies the cause of the view-state failure.
When the view-state error occurs, ASP.NET raises a System.Web.Management.WebViewStateFailureAuditEvent with a major code of WebEventCodes.AuditInvalidViewStateFailure and a detail code of WebEventCodes.InvalidViewState.