The AdoDbx Client implements an ADO.NET 2.0 provider for all dbExpress version 4 drivers that implement the newer extended metadata added to dbExpress 4. All dbExpress drivers shipped with Delphi implement the newer extended metadata. 

AdoDbx Client is an implementation of the ADO.NET 2.0 Provider classes. ADO.NET Provider is a set of classes that provide database services for .NET. It provides access to relational databases, XML and application data. You can use it to develop front end database applications as well as multi-tier business applications. 

See .NET Framework Developer's Guide ADO.NET in the Microsoft documentation for more information. 

Here are the key classes in the AdoDbx Client ADO.NET implementation.

• TAdoDbxCommand. Represents a SQL statement or stored procedure to execute against a data source.
• TAdoDbxCommandBuilder. Generates single-table commands as part of the operation of the TAdoDbxDataAdapter.
• TAdoDbxConnection. Represents a connection to a database.
• TAdoDbxDataAdapter. Acts as a bridge between a DataSet and the underlying database.
• TAdoDbxDataReader. Class to read rows forward-only from a data source.
• TAdoDbxParameter. Represents a parameter that is passed to or from a command.
• TAdoDbxParameterCollection. Collects TAdoDbxParameters into a .NET collection object that can be read and manipulated.
• TAdoDbxProviderFactory. Base class for a provider's implementation of data source classes.
• TAdoDbxTransaction. A group of commands for a connection that can be committed or rolled back.