Microsoft.WindowsAzure.MobileServices.Sync.OperationQueue.PeekAsync C# (CSharp) Method

        public async virtual Task<MobileServiceTableOperation> PeekAsync(long prevSequenceId, MobileServiceTableKind tableKind, IEnumerable<string> tableNames)
        {
            MobileServiceTableQueryDescription query = CreateQuery();

            var tableKindNode = Compare(BinaryOperatorKind.Equal, "tableKind", (int)tableKind);
            var sequenceNode = Compare(BinaryOperatorKind.GreaterThan, "sequence", prevSequenceId);

            query.Filter = new BinaryOperatorNode(BinaryOperatorKind.And, tableKindNode, sequenceNode);

            if (tableNames != null && tableNames.Any())
            {
                BinaryOperatorNode nameInList = tableNames.Select(t => Compare(BinaryOperatorKind.Equal, "tableName", t))
                                                          .Aggregate((first, second) => new BinaryOperatorNode(BinaryOperatorKind.Or, first, second));
                query.Filter = new BinaryOperatorNode(BinaryOperatorKind.And, query.Filter, nameInList);
            }

            query.Ordering.Add(new OrderByNode(new MemberAccessNode(null, "sequence"), OrderByDirection.Ascending));
            query.Top = 1;

            JObject op = await this.store.FirstOrDefault(query);
            if (op == null)
            {
                return null;
            }

            return MobileServiceTableOperation.Deserialize(op);
        }