Error en un datagrid...

[univercity]

Este codigo Utilizo, c#...

<script runat="server">
private void Page_Load(object sender, System.EventArgs e) {

System.Xml.XmlTextWriter writer = new System.Xml.XmlTextWriter(Response.OutputStream, System.Text.Encoding.UTF8);

escribirInicioRSS(writer);


OleDbConnection OleDbConnection = new OleDbConnection("PROVIDER=MICROSOFT.JET.OLEDB.4.0; DATA SOURCE=" + Server.MapPath("../bdwine/articulos.mdb"));
OleDbCommand myCommand = new OleDbCommand("select * from tabla1 where seccion='pagos'", OleDbConnection);
OleDbConnection.Open();
OleDbDataReader dr = myCommand.ExecuteReader();
DataGrid1.DataSource = dr ;
DataGrid1.DataBind();
myConnection.Close();


el error me lo genera en el datagrid1...
The type or namespace name 'DataGrid1' could not be found (are you missing a using directive or an assembly reference?)

DataGrid1.DataSource = dr ;


alguien que sepa lo que pasa, que me de una mano, please...