Its name is D4Modelizer
, it's completely free and very, very useful. This tool performs the modelling of any selected tables of you database to C# classes. The generated classes include the tables' fields as properties, and the needed methods to add, update, delete and get records. D4Modelizer can make class models out of SQL Server (and MSDE, of course), MS Access, DB/2, MySQL, Firebird and PostgreSQL.