If you want to delete all records from a table with LLBLGen Pro v2.6 without first fetching all records, you can use the DataAccessAdapter DeleteEntitiesDirectly function.

            // Define the query that matches all records to be deleted.
            // If no PredicateExpression are added all records will be deleted.
            RelationPredicateBucket bucket = new RelationPredicateBucket();

            // If you want to delete only the customers that have an Id != 100, uncomment the following line
            // bucket.PredicateExpression.Add(CustomerFields.Id != 100);

            // Initialize DataAccessAdapter
            using (DataAccessAdapter da = new DataAccessAdapter("server=MyServer; database=Test; Trusted_Connection=False;"))
            {
                // Delete the records from table CustomerEntity (TSQL query: delete Customer)
                da.DeleteEntitiesDirectly("CustomerEntity", bucket);
            }