EntityMetadata.DisplayName.UserLocalizedLabel is null

public List<ValuesResponseData> Entities(IOrganizationService service)
        {
            RetrieveAllEntitiesRequest retrieveEntities = new RetrieveAllEntitiesRequest()
            {
                EntityFilters = EntityFilters.Attributes,
                RetrieveAsIfPublished = true
            };
            RetrieveAllEntitiesResponse retrieveEntitiesResponse = (RetrieveAllEntitiesResponse)service.Execute(retrieveEntities);
            

            EntityMetadata[] entityMetadatas = retrieveEntitiesResponse.EntityMetadata;
            List<ValuesResponseData> entityresponsedata = new List<ValuesResponseData>();
            
            for(int i = 0; i < entityMetadatas.Length; i++)
            {
                ValuesResponseData tempEntityResponse = new ValuesResponseData();
                if (entityMetadatas[i].DisplayName.UserLocalizedLabel != null)
                {
                    tempEntityResponse.Nome = entityMetadatas[i].DisplayName.UserLocalizedLabel.Label.ToString().Replace('"', '\'');
                    tempEntityResponse.LogicalName = entityMetadatas[i].LogicalName;
                    tempEntityResponse.PrimaryName = entityMetadatas[i].PrimaryNameAttribute;
                    entityresponsedata.Add(tempEntityResponse);
                }
            }
            

            return entityresponsedata;
        }