The Last Component has released their Persistent Dataset Framework, a persistence framework for .NET 2.0. This framework uses strongly typed Datasets and queries. It also includes support for lazy loading, nullable types, and advanced databinding.

Features include:
-Mapping to tables, view, and stored procedures including procedure’s result sets.
-Keeps your application code synchronized with database modifications.
-Based on the native DataSets.
-Offers complete n-tier workflow inclusive GUI binding.
-Allows writing 100% typed code using generated Typed Queries.
-Supports database identities, sequence generators
-Optimistic concurrency using database timestamps and locking fields
-Complete MS Visual Studio integration inclusive SourceSafe support
-Transactions
-Generating enumerations for basic tables
-Nullable<T> generics support
-Cascade load, save, update, delete and insert of hierarchical data
-Inheritance and Polymorphism

Ultimate typed queries technology allows to verify your queries against database at compile time.

NorthwindPDS ds = new NorthwindPDS();
OrderQuery q = new OrderQuery();
q.Criteria = (q.CustomerID == "TRADH" && (q.RequiredDate - q.ShippedDate).Days > 31);
ds.Order.Fill(q);

Read more at: http://www.lastcomponent.com/