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OleDbConnection con = new OleDbConnection();
            OleDbCommand cmd = new OleDbCommand();            
            int anzahl;
            con.ConnectionString = "Provider=Microsoft.Jet.OLEDB.4.0;" + "Data Source=C:\\Dokumente und Einstellungen\\tom\\Desktop\\Userdb.mdb";

            cmd.Connection = con;
            cmd.CommandText = "insert into User(id, name) values(11, 'tom')";

            con.Open();
            anzahl = cmd.ExecuteNonQuery();
            MessageBox.Show(anzahl+"");
            con.Close();					

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insert into User(id, name) values(11, 'tom')