The DataDirect Connect for ADO.NET 4.0 data providers run on .NET Framework versions 2.0, 3.0, 3.5, 3.5 SP1, 4.0 or higher.If you are not using the ADO.NET Entity Framework, existing code written for earlier versions of the .NET Framework and earlier versions of DataDirect Connect for .NET is compatible with this release of the data provider.