How do I list CheckBoxes in a Canvas, so that they dont get out of the Border?

I am sry for the Titel but I dont know how to describe the Problem in one sentence. So my Problem is a Design Problem in c# / xaml. My Program read out data from a txt-File and creates out of that data Checkboxes inside a Canvas. The Problem is that the CheckBoxes get listet among themselves and continue that over the border of the Canvas instead of listing the new ones in a new Column. So my Question is: How do I list them without that they getting over the Border of the Canvas?

dg_Rohdaten.SetBinding(ItemsControl.ItemsSourceProperty, new Binding { Source = dtbl_erste_Zeile });


      double offset = 0;
      //Checkboxen und Labels erzeugen

      for (int i = startindex; i < dtbl_erste_Zeile.Columns.Count - 1; i = i + wiederholung)
     {

      if (i / wiederholung > anzahl)
      { break; }
      Merkmalsliste.Add(Convert.ToString(dtbl_erste_Zeile.Rows[0][i]));
      cb_activated_Measurements.Add(new CheckBox());
      Checkers.Children.Add(cb_activated_Measurements[cb_activated_Measurements.Count - 1]);
      Canvas.SetTop(cb_activated_Measurements[cb_activated_Measurements.Count - 1], offset);
                


      activated_Measurements_label.Add(new Label());
                
  Checkers.Children.Add(activated_Measurements_label[activated_Measurements_label.Count - 1]);
Canvas.SetTop(activated_Measurements_label[activated_Measurements_label.Count - 1], offset - 5);
Canvas.SetLeft(activated_Measurements_label[activated_Measurements_label.Count - 1], 20) 
activated_Measurements_label[activated_Measurements_label.Count - 1].Content = Convert.ToString(dtbl_erste_Zeile.Rows[0][i]);
                offset = offset + 20;
 }

The Code above is the Code to create the CheckBoxes inside the Canvas names "Checkers". I hope you understand my question and can help me with my Problem :)