I want to use Firebird 2.5 SuperServer as back-end to .NET 4.0 application. Which ORM tool is compatible to work with .NET 4.0 & Firebird 2.5?
5 Answers
You could also try out Telerik OpenAccess ORM.

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Sorry I forgot to mention FREE. I am looking for open-source alternatives. – RKh Oct 03 '11 at 03:33
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I downloaded OpenAccess but it is not recognizing Firebird Data Source. – RKh Oct 04 '11 at 15:25
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Can you try by manually entering the Firebird connection string in the 'Connection string' textbox? That should work. – alwayslearning Oct 04 '11 at 17:01
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Can you provide me the connection string you entered? Maybe I can provide you with a solution to your problem – alwayslearning Oct 09 '11 at 05:53
People are using NHibernate with Firebird.
The wiki docs list only Firebird 2.0.1, so I would download it with NuGet, check the supported dialects in the latest version, and test it.
the Telerik OpenAccess ORM is free unless you want features that are not found in EF5. Basically the Telerik OpenAccess is as good as EF otherwise why not use free EF?
I am looking for an ORM for Firebird 1.5 as the migration to 2.5 is too hard/costly and if one were to take the pain would be better to migrate to a more contemporary product, with more productive tooling such as MSSQL etc.

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Symbiotic ORM is free, but not open source.
I haven't tried it on 2.5 but it does works on the latest 3.0
https://www.nuget.org/packages/Symbiotic_Micro_ORM_Net_Standard_x64/3.0.0
There's also a helper to create your poco classes from an existing schema: https://www.microsoft.com/store/productId/9NN20Q6WFKGS
Entity Framework Core: EntityFrameworkCore.FirebirdSQL or FirebirdSql.EntityFrameworkCore.Firebird

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