crm2011开启实体审核

 public void EnableEntityAuditing(IOrganizationService service,string entityName)
        {
            RetrieveEntityRequest er = new RetrieveEntityRequest() {
                LogicalName = entityName,
                EntityFilters = Microsoft.Xrm.Sdk.Metadata.EntityFilters.Attributes
            };
            RetrieveEntityResponse entityResponse = (RetrieveEntityResponse)service.Execute(er);
            EntityMetadata entityMetadata = entityResponse.EntityMetadata;

            //原来状态
            bool oldValue = entityMetadata.IsAuditEnabled.Value;
            entityMetadata.IsAuditEnabled = new BooleanManagedProperty(true);
           
            UpdateEntityRequest updateEntityRequest = new UpdateEntityRequest { Entity = entityMetadata };
            UpdateEntityResponse updateEntityResponse = (UpdateEntityResponse)service.Execute(updateEntityRequest);
        }