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persisting collection in a custom datagrid

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I appologize for the cross-posting, but I received no responses from
the building controls group.

I have a custom control that inherits from a DataGrid control. I have
a property that has an arraylist of strings. I want to add items as a
child tag of the grid. How is the best way to do this. Here is what I
have as of now.

[ToolboxData("<{0}:OrdersDataGrid runat=server></{0}:OrdersDataGrid>"),

public class OrdersDataGrid : System.Web.UI.WebControls.DataGrid
private ArrayList dataMethodParameter = null;
Editor("System.Windows.Forms.Design.StringCollecti onEditor,
System.Design", "System.Drawing.Design.UITypeEditor, System.Drawing"),

DesignerSerializationVisibility(DesignerSerializat ionVisibility.Content),

Description("Parameter to Pass to the selected OrdersProvider
public ArrayList DataMethodParameter
get{return this.dataMethodParameter;}
set{this.dataMethodParameter = value;}


What I would like to happen is when items are added via the
StringCollectionEditor they are child items of the control
<cc1:OrdersDataGrid ... >

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