var practs = new List<Practitioner>();
            var practs1 = new List<Practitioner>();
            using (var client = new CrmServiceClient())
            {
                var q = new GetQuery();
                q.ApiVersion = 1;
                q.ApiKey = key;
                q.Limit = 10000;
                q.ObjectFields = new PractitionerFields();
                q.Offset = 10000;
                var pract = client.Get(q);
                practs.AddRange(pract.Results.Cast<Practitioner>());
            }


            using (var client = new CrmServiceClient())
            {
                var q = new GetQuery();
                q.ApiVersion = 1;
                q.ApiKey = key;
                q.ObjectFields = new PractitionerFields();
                q.Filters = new[] {new IdsFilter() {Ids = practs.Select(x => x.Id).ToArray()},};
                var pract = client.Get(q);
                practs1.AddRange(pract.Results.Cast<Practitioner>());
            }