score:2

DataContext

DataContext is LinqToSql. LinqToSql is for SqlServer only.

Perhaps you meant to use LinqToEntities and ObjectContext?

score:0

If one wants to use LINQ to SQL for RDBMS other than Microsoft SQL Server, a third-party assembly is required. DBLinq is a project that provides LINQ to SQL functionality for other (open-source) databases.

http://code.google.com/p/dblinq2007/

Npgsql can be configured as a db provider for Entity Framework following the documentation on this Npgsql blog:

http://npgsql.com/index.php/2009/08/how-to-set-up-entity-framework-npgsql-part-1/


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