Best free ORM tools to use with .NET 2.0/3.5 [closed]

Answer 1

SubSonic is not as extensive as nHibernate; rather, it is a straight forward Active Record 1 class per table Data Access Layer.

Some of the features are a query tool, ability to execute stored procedures and a scaffolding app in ASP.net. You can be up and running within 30 minutes or less, with a tiny learning curve and minimal configuration in the Config.app file.

Answer 2

Checkout XmlDataMapper a simple free ORM (LGPL Licence) which leaves a low memory footprint compared to the other giants. The sample project provided should be good enough to get started.

To integrate XmlDataMapper all you need to do is 4 little steps

1. Create a Business Entity / DTO for the tables
2. Create an XML File with the mapping information between the table and the DTO.
3. Specify the DTO and xml file in the configuration.
4. Just call the DTOConverter.Convert(dataReader) and other such methods to convert your database record to DTO / Business Entity

Answer 3

I didn't investigate ActiveRecord simply by the fact that according to independant serveys it does not perform as fast as many other ORMs and it does not have a full Linq implementation.

DataObjects.NET requires that all your entities be derived from special classes, but in exchange for this you respectable performance and goodies like in-memory storage providers and the most complete Linq implementation going.

I spend the afternoon sifting through the source code of DBLinq. My opinion is that it is immature (many of Linq-To-SQL's features are simply not implemented), and I wouldn't recommend it for production systems.

So then... if you're looking for a free, fast, open source, LINQ compliant ORM then DataObjects.NET is a pretty safe bet.

Answer 4

I use NHibernate and NHibernate Annotations. It is working well - without mapping files (entity.xml). Unfortunately you have to at Log4net which requires a tiny xml file.

Answer 5

See this List of ORM tools ".Net"

It contains all the famous .Net ORM tools

Answer 6

Try , Subsonic

and you can use Linq2Sql ORM as well.