# Aerospike C# Client Release 4.1.1 (December 18, 2020)

**URL:** <https://discuss.aerospike.com/t/aerospike-c-client-release-4-1-1-december-18-2020/8088>\
**Category:** Releases (Server, Client & Tools)\
**Created:** [December 18, 2020, 11:34pm UTC](https://discuss.aerospike.com/t/aerospike-c-client-release-4-1-1-december-18-2020/8088 "2020-12-18T23:34:04Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![mcoberly](https://sea1.discourse-cdn.com/flex019/user_avatar/discuss.aerospike.com/mcoberly/32/637_2.png) [@mcoberly](https://discuss.aerospike.com/u/mcoberly)\
**Post date:** [December 18, 2020, 11:34pm UTC](https://discuss.aerospike.com/t/aerospike-c-client-release-4-1-1-december-18-2020/8088/1 "2020-12-18T23:34:04Z")

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[Aerospike C# client version 4.1.1](https://www.aerospike.com/download/client/csharp/notes.html#4.1.1)was released on December 18, 2020.

This minor release adds new features and bug fixes.

- A bug affecting this version of the C# client [has been identified](https://discuss.aerospike.com/t/scan-bug-identified-client-1637/9095). If your application uses scans, but does not use `Policy.priority` , `ScanPolicy.scanPercent` or `ScanPolicy.failOnClusterChange` , you can safely upgrade to C# client 4.2.7. We strongly recommend that you do so at the earliest opportunity.

#### Features

- Add Exp.Val(ulong val).
- CLIENT-1387 Deprecate MapOperation.Decrement(). Use MapOperation.Increment() with a negative value instead.

#### Fixes

- CLIENT-1391 Reset peers, partition and rebalance generations on node tend errors. This forces a client node refresh when a node is quickly restarted with the same generation, but with different peers, partition maps or rack nodes.
- CLIENT-1395 Fix NullReferenceException when async query is run with failOnClusterChange set to true.