ActiveX Data Objects (ADO) is based on COM, whereas ADO.NET is based on managed providers defined by the.NET CLR (Common Language Runtime). ADO.NET enables consistent access to data sources such as SQL Server, as well as OLE DB and XML-based data sources.
ADO.NET is a set of managed classes that enable.NET programmes to connect to data sources like Microsoft SQL Server, Microsoft Access, Oracle, and XML, as well as execute commands and manage detached data.
ADO.NET is a framework that allows you to deal with data sources including databases and XML files. ActiveX Data Objects (ADO) is an acronym for ActiveX Data Objects. It enables us to access underlying data and databases. It has data retrieval and manipulation classes and methods.