Represents the event code indicating that the supplied view state failed the integrity check. This field is constant.
Value: 50203
WebEventCodes.InvalidViewStateMac is the detail code that specifies the cause of the view-state failure.
When the supplied view state fails the integrity check, ASP.NET raises a System.Web.Management.WebViewStateFailureAuditEvent with a major code of WebEventCodes.AuditInvalidViewStateFailure and a detail code of WebEventCodes.InvalidViewStateMac.