ADO.NET stands for ActiveX Data Object in the .NET framework.

ADO.NET is mainly used with .NET to make the database interaction with your application.

You need to understand that ADO is not only meant for simple data  purpose. You can also work with XML data while interacting with the database.

ADO is like a bridge that helps to make interaction with the database.

You can use it like a buffer for interaction with application and the database.

So while making interactions you need to understand the classes that are used for communicating with the database.

Main classes that are used for communication are:

• SqlConnection
• SqlDataReader
• SqlDataAdapter
• SqlCommand

These classes are mainly used to provide interaction with the database .