# Aerospike C# Client Release 4.0.3 (November 11, 2020)

**URL:** <https://discuss.aerospike.com/t/aerospike-c-client-release-4-0-3-november-11-2020/8001>\
**Category:** Releases (Server, Client & Tools)\
**Created:** [November 11, 2020, 9:54pm UTC](https://discuss.aerospike.com/t/aerospike-c-client-release-4-0-3-november-11-2020/8001 "2020-11-11T21:54:11Z")\
**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:** [November 11, 2020, 9:54pm UTC](https://discuss.aerospike.com/t/aerospike-c-client-release-4-0-3-november-11-2020/8001/1 "2020-11-11T21:54:11Z")

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[Aerospike C# client version 4.0.3](https://www.aerospike.com/download/client/csharp/notes.html#4.0.3)was released on November 11, 2020.

This minor release adds a new feature.

- 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

- CLIENT-1373 Retrofit support for old PredExp in addition to new **[Expressions](https://www.aerospike.com/docs/guide/expressions)**. Both expression filters will be supported for 1 year in order to ease the transition to new Expression APIs. After that, PredExp support will be permanently removed. Also, support server version 4.9+ instead of the more strict 5.2.0.4+ requirement. Expression API usage still requires server 5.2.0.4+.