Private _dataSet As DataSet
Private Sub Window_Loaded(ByVal sender As Object, ByVal e As RoutedEventArgs)
    ' コレクションを作成して、データセットに入力
    Dim mdbFile As String = "c:\db\nwind.mdb"
    Dim connString As String = String.Format("Provider=Microsoft.Jet.OLEDB.4.0; Data Source={0}", mdbFile)
    Dim conn As New OleDbConnection(connString)
    Dim adapter As New OleDbDataAdapter("SELECT TOP 10 ProductName, UnitPrice FROM Products " & vbCr & vbLf & " ORDER BY UnitPrice;", conn)
  
    _dataSet = New DataSet()
    adapter.Fill(_dataSet, "Products")
  
    ' データテーブルの行をグラフデータのソースとして設定
    c1Chart1.Data.ItemsSource = _dataSet.Tables("Products").Rows
End Sub

DataSet _dataSet;
private void Window_Loaded(object sender, RoutedEventArgs e)
{
  // コレクションを作成して、データセットに入力
  string mdbFile = @"c:\db\nwind.mdb";
  string connString = string.Format(
    "Provider=Microsoft.Jet.OLEDB.4.0; Data Source={0}",
    mdbFile);
  OleDbConnection conn = new OleDbConnection(connString);
  OleDbDataAdapter adapter = new OleDbDataAdapter( "SELECT TOP 10 ProductName, UnitPrice FROM Products ORDER BY UnitPrice;", conn);
  _dataSet = new DataSet();
  adapter.Fill(_dataSet, "Products");
  // データテーブルの行をグラフデータのソースとして設定
  c1Chart1.Data.ItemsSource = _dataSet.Tables["Products"].Rows;
}