C# ADO.NET Data Providers
The .Net Framework includes mainly three Data Providers for ADO.NET. They are the Microsoft SQL Server Data Provider , OLEDB Data Provider and ODBC Data provider. You can see from the following links how these Data Providers making connection to the specified data Sources from your C# applications.
The four Objects from the .Net Framework provide the functionality of Data Providers in ADO.NET. They are Connection Object, Command Object , DataReader Object and DataAdapter Object. The following link shows how to use these Objects in C# applications .