A free of charge connectivity solution for PostgreSQL built over ADO.NET.
dotConnect Express forPostgreSQL is a free of charge database connectivity solution built over ADO.NET architecture and a development framework with number of innovative technologies. It offers basic functionality for developing database-related applications and web sites. It introduces new approaches for designing applications and boosts productivity of database application development.
Key Features:
*Direct Access to PostgreSQL server
*100% managed code
*High performance
*Easy to deploy
*Supports the latest versions of PostgreSQL server
*All PostgreSQL data types support
*Operates in both connected and disconnected models
*Extra data binding capabilities
*Cross-form components cooperation
*Licensed royalty-free per developer, per team, or per site
*Free of charge

dotConnect Express for PostgreSQL supports PostgreSQL server since version 7.1 to 8.3, EnterpriseDB, Pervasive Postgres SQL servers. The provider works with .NET Frameworks 2.0, 3.0, 3.5. dotConnect Express for PostgreSQL supports Mono version 2.0 and above.
Development environments:

* Microsoft Visual Studio .NET 2002, 2003, 2005 and 2008
* Turbo Delphi for .NET Professional
* Turbo C# Professional
* Borland Developer Studio 2006
* Borland Developer Studio 2005
* Borland Delphi 8

new:
* Implemented Default Command Timeout property in PgSqlConnectionStringBuilder class
* Fixed bugs in DataSet Wizard with Web Service projects
* Fixed bug with licensing projects using wizard in nested folders of solution
* Fixed bug with timestamp without time zone field value inexact retrieving
* Fixed bug with SSL mode in Mobile version

LINQ to PostgreSQL

* Suported DeleteOnNull attribute of association and changed default behaviour (DeleteOnNull=false now)

Entity Developer

* Added support for EF Precision and Scale facets
* Improved MS EDM Designer compatibility
* Fixed bug with using Entity Developer in Web Site projects you can free download dotConnect Express for PostgreSQL 4.65.62 now.