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Asked: 2026-05-16T03:39:25+00:00

I’m looking for a good ORM for an upcoming project. The database will have

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I’m looking for a good ORM for an upcoming project.

The database will have around 1000 to 1200 tables, and it will be in Both SQL Server and Oracle, which will be used depending of customers enterprise needs.
Also a few part of the project will work with WCF services.
I want a designer or something like that.
Good support of LINQ.
Acceptable performance.

I have tried DataObjects.Net but it doesn’t have any designer. We can’t code all that tables nor use code generator. And I’m not sure if DataObjects.Net supports switching database.
Also I’m familiar with EF4 but it can’t support both databases together, and switching databases manually(modifying the edmx file) is such a pain in … for maintenance job.

Thanks in advance.

Edit: Seems OpenAccess and LLBLGEN Pro have designer but I don’t have experience with them.

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1 Answer

  1. Editorial Team

    I would still vote for Entity Framework v4 – EF4.

    After all:

    • you can have multiple EDMX files, no problem – one for SQL Server, one for Oracle

    • you could put those into their own class library, and then load or, or the other, or both, if needed, at runtime (e.g. by using the Managed Extensibility Framework or something of your own)

    • you can easily target those EDMX files at databases using connection strings – really not hard at all

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