ADO.NET is also a part of the .NET Framework. ADO.NET is used to handle data access. With ADO.NET you can work with databases.
ADO.NET is a part of the .NET Framework
ADO.NET consists of a set of classes used to handle data access

Create a Database Connection

SqlConnection con = new SqlConnection(sqlString);
con.Open();
 SqlCommand cmd = new SqlCommand("select id, pass from student", con);SqlDataReader dr = cmd.ExecuteReader();
con.Close();use following namspaceusing System.Data;
 
using System.Data.SqlClient;
string sqlString = "Server=(local); Database=my; User Id=sa; Password=sa";