--- title: Release Notes - FIX Engine for .NET Core - Version 1.7.0 description: Improvement - EngineSettings.Key and EngineSettings.Default classes have null values in documentation - Method chaining for Groups - Improve corrupted --- [OnixS ](https://www.onixs.biz/) - [Products](https://www.onixs.biz/products.html) - [Support](https://www.onixs.biz/support.html) - [Contact us](https://www.onixs.biz/contact-us) Search Menu # Release Notes - FIX Engine for .NET Core - Version 1.7.0 - [Home](https://www.onixs.biz) - [Release Notes](https://www.onixs.biz/release-notes/) 30 Aug 2021 ## Improvement - [[NETCOREFIXENGINE-848](https://support.onixs.biz/browse/NETCOREFIXENGINE-848)] - EngineSettings.Key and EngineSettings.Default classes have null values in documentation - [[NETCOREFIXENGINE-816](https://support.onixs.biz/browse/NETCOREFIXENGINE-816)] - Method chaining for Groups - [[NETCOREFIXENGINE-789](https://support.onixs.biz/browse/NETCOREFIXENGINE-789)] - Improve corrupted storage processing - [[NETCOREFIXENGINE-757](https://support.onixs.biz/browse/NETCOREFIXENGINE-757)] - BREAKING CHANGE: Convert the IMessage.IsSessionLevel property to a method - [[NETCOREFIXENGINE-751](https://support.onixs.biz/browse/NETCOREFIXENGINE-751)] - BREAKING CHANGE: Rename FlatMessage.Remove() to FlatMessage.RemoveLastField() - [[NETCOREFIXENGINE-749](https://support.onixs.biz/browse/NETCOREFIXENGINE-749)] - Add FlatMessage sample - [[NETCOREFIXENGINE-744](https://support.onixs.biz/browse/NETCOREFIXENGINE-744)] - Session.Logout(..) methods should throw an exception when failing to get the response - [[NETCOREFIXENGINE-743](https://support.onixs.biz/browse/NETCOREFIXENGINE-743)] - Add FlatMessage documentation clauses - [[NETCOREFIXENGINE-729](https://support.onixs.biz/browse/NETCOREFIXENGINE-729)] - Optimize the memory allocation in AsyncFileBasedStorage - [[NETCOREFIXENGINE-728](https://support.onixs.biz/browse/NETCOREFIXENGINE-728)] - Optimize the memory allocation in FileBasedStorage - [[NETCOREFIXENGINE-713](https://support.onixs.biz/browse/NETCOREFIXENGINE-713)] - State change diagram contains incorrect transition link - [[NETCOREFIXENGINE-677](https://support.onixs.biz/browse/NETCOREFIXENGINE-677)] - During the disconnect, the session should be moved to the Disconnected state only after the completion of the underlying connection closing - [[NETCOREFIXENGINE-621](https://support.onixs.biz/browse/NETCOREFIXENGINE-621)] - Allow to change the Session validation settings in the Disconnected state only - [[NETCOREFIXENGINE-605](https://support.onixs.biz/browse/NETCOREFIXENGINE-605)] - Document FlatGroupReader - [[NETCOREFIXENGINE-566](https://support.onixs.biz/browse/NETCOREFIXENGINE-566)] - Speed up the checksum verification and calculation - [[NETCOREFIXENGINE-468](https://support.onixs.biz/browse/NETCOREFIXENGINE-468)] - Add an explanation of how to work with types of tags in custom dialect - [[NETCOREFIXENGINE-393](https://support.onixs.biz/browse/NETCOREFIXENGINE-393)] - Add TypedMessagesGenerator ability to process the dialect mode - [[NETCOREFIXENGINE-321](https://support.onixs.biz/browse/NETCOREFIXENGINE-321)] - Optimized Decimal parsing ## New Feature - [[NETCOREFIXENGINE-847](https://support.onixs.biz/browse/NETCOREFIXENGINE-847)] - Add Session.SendBufferSize property - [[NETCOREFIXENGINE-846](https://support.onixs.biz/browse/NETCOREFIXENGINE-846)] - Add Session.ReceiveBufferSize property - [[NETCOREFIXENGINE-839](https://support.onixs.biz/browse/NETCOREFIXENGINE-839)] - Add Session.WarmUp(IMessage msg) method - [[NETCOREFIXENGINE-817](https://support.onixs.biz/browse/NETCOREFIXENGINE-817)] - Add Session.OutboundQueueBytes property - [[NETCOREFIXENGINE-754](https://support.onixs.biz/browse/NETCOREFIXENGINE-754)] - Add RepeatingGroupFlatMessage sample - [[NETCOREFIXENGINE-722](https://support.onixs.biz/browse/NETCOREFIXENGINE-722)] - Add EngineSettings.LogoutTimeout - [[NETCOREFIXENGINE-485](https://support.onixs.biz/browse/NETCOREFIXENGINE-485)] - Support SOCKS5 proxies - [[NETCOREFIXENGINE-398](https://support.onixs.biz/browse/NETCOREFIXENGINE-398)] - Add EngineSettings.LogonTimeout ## Bug - [[NETCOREFIXENGINE-795](https://support.onixs.biz/browse/NETCOREFIXENGINE-795)] - Session.MessageResending should use FlatMessage arg if such mode is specified for the session - [[NETCOREFIXENGINE-793](https://support.onixs.biz/browse/NETCOREFIXENGINE-793)] - Standard dictionaries are always used when reading summary files for resend - [[NETCOREFIXENGINE-788](https://support.onixs.biz/browse/NETCOREFIXENGINE-788)] - Session.ResendingQueueSize does not work as expected - [[NETCOREFIXENGINE-778](https://support.onixs.biz/browse/NETCOREFIXENGINE-778)] - BREAKING CHANGE: Remove FixmlConverter.UseFormatting() method - [[NETCOREFIXENGINE-770](https://support.onixs.biz/browse/NETCOREFIXENGINE-770)] - The Session does not Dispose of its underlying Storage when close it - [[NETCOREFIXENGINE-766](https://support.onixs.biz/browse/NETCOREFIXENGINE-766)] - Decimal fields initial value missed - [[NETCOREFIXENGINE-764](https://support.onixs.biz/browse/NETCOREFIXENGINE-764)] - Invalid value of the 'v' attribute for the 'FIX' node when using FIX5.0 SP2 - [[NETCOREFIXENGINE-753](https://support.onixs.biz/browse/NETCOREFIXENGINE-753)] - FlatGroupReader fails when an entry has a single tag ### Related articles [See all release notes](https://www.onixs.biz/release-notes/) 17 Apr 2026 ##### [ Release Notes - .NET FIX Engine - Version 1.19.0 ](https://www.onixs.biz/release-notes/release-notes-net-fix-engine-version-1-19-0.html) 23 Dec 2025 ##### [ Release Notes - .NET FIX Engine - Version 1.18.0 ](https://www.onixs.biz/release-notes/release-notes-net-fix-engine-version-1-18-0.html) 17 Dec 2025 ##### [ Release Notes - .NET FIX Engine - Version 1.17.6 ](https://www.onixs.biz/release-notes/release-notes-net-fix-engine-version-1-17-6.html) 19 Sep 2025 ##### [ Release Notes - .NET FIX Engine - Version 1.17.0 ](https://www.onixs.biz/release-notes/release-notes-net-fix-engine-version-1-17-0.html) 11 Jul 2025 ##### [ Release Notes - .NET FIX Engine - Version 1.16.1 ](https://www.onixs.biz/release-notes/release-notes-net-fix-engine-version-1-16-1.html-1) ### Other recent articles [See all release notes](https://www.onixs.biz/release-notes/) 8 Jul 2026 ##### [Release Notes - 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