How to use OleDb DataReader

VB.NET

Dim strConn As String = 'Provider=Microsoft.Jet.OLEDB.4.0;Data Source=' + Server.MapPath('nwind.mdb') & ';'
Dim strsql As String = 'Select * from  Customers'
Dim cn As New OleDbConnection(strConn)
Dim cmd As New OleDbCommand(strsql, cn)
cn.Open()
Dim dr As OleDbDataReader = cmd.ExecuteReader(CommandBehavior.CloseConnection)
DataGrid1.DataSource = dr
DataGrid1.DataBind()

C#

string  strConn  = 'Provider=Microsoft.Jet.OLEDB.4.0;Data Source=' + Server.MapPath('nwind.mdb') + ';';
string strsql  = 'Select * from  Customers';
OleDbConnection cn = new OleDbConnection(strConn);
OleDbCommand  cmd = new OleDbCommand (strsql, cn);
cn.Open ();
OleDbDataReader dr = cmd.ExecuteReader(CommandBehavior.CloseConnection );
DataGrid1.DataSource = dr;
DataGrid1.DataBind();