// Namespaces, variables, and constants using System; using System.Configuration; using System.Data; using System.Data.Odbc; private void CButton_Click(object sender, System.EventArgs e) {     // Create the DataAdapter.     String sql = "SELECT ID, Name FROM Products";     OdbcDataAdapter da = new OdbcDataAdapter(sql,ConfigurationSettings.AppSettings["connectionstring1"]);     // Create the table, fill it, and bind the default view to the grid.     DataTable dt = new DataTable( );     da.Fill(dt); }