(C#) ASP.NET - DataSet()

DataSet ds = new DataSet();

System.Data.OleDb.OleDbConnection objConn = new System.Data.OleDb.OleDbConnection();
System.Data.OleDb.OleDbCommand objCmd = new System.Data.OleDb.OleDbCommand();
System.Data.OleDb.OleDbDataAdapter dtAdapter = new System.Data.OleDb.OleDbDataAdapter();

DataSet ds = new DataSet();
String strConnString,strSQL;

strConnString = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + 
Server.MapPath("database/mydatabase.mdb")+";Jet OLEDB:Database Password=;";
strSQL = "SELECT * FROM customer";

objConn.ConnectionString = strConnString;

objCmd.Connection = objConn;
objCmd.CommandText = strSQL;
objCmd.CommandType = CommandType.Text;

dtAdapter.SelectCommand = objCmd;

dtAdapter.Fill(ds);

dtAdapter = null;
objConn.Close();
objConn = null;