Read here (https://www.tabsoverspaces.com/233727-firebirdclient-version-6-0-entity-framework-core-2-x-provider-entity-framework-6-provider) and here (https://github.com/FirebirdSQL/NETProvider/releases/tag/6.0.0.0).

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Mgr. Jiří Činčura
https://www.tabsoverspaces.com/