GridGroupingControl issues

I am having a problem with the GridGroupingControl. I am using it in an inherited form, where the Grid was added to the base class. For some reason, when the form loads i get the following exception:

Item has already been added. Key in dictionary: "Row 1Summary 1"
Key being added: "Row 1Summary 1".

The exception is:

See the end of this message for details on invoking
just-in-time (JIT) debugging instead of this dialog box.

************** Exception Text **************
System.ArgumentException: Item has already been added. Key in dictionary: "Row 1Summary 1" Key being added: "Row 1Summary 1"
at System.Collections.SortedList.Add(Object key, Object value)
at Syncfusion.Grouping.SummaryDescriptorCollection.Find(String name)
at Syncfusion.Grouping.SummaryDescriptorCollection.IndexOf(String name)
at Syncfusion.Windows.Forms.Grid.Grouping.GridTable.GetColumnMaxLength(GridColumnDescriptor column, FieldDescriptor rfield)
at Syncfusion.Windows.Forms.Grid.Grouping.GridTable.GetColumnMaxLength(GridColumnDescriptor column)
at Syncfusion.Windows.Forms.Grid.Grouping.GridTable.GetPreferredColumnWidth(Graphics g, GridColumnDescriptor column, Int32 maxWidth)
at Syncfusion.Windows.Forms.Grid.Grouping.GridTable.GetPreferredColumnWidth(Graphics g, GridColumnDescriptor column)
at Syncfusion.Windows.Forms.Grid.Grouping.GridTableModel.UpdateColumnWidths(Boolean force)
at Syncfusion.Windows.Forms.Grid.Grouping.GridTableModel.UpdateColumnWidths()
at Syncfusion.Windows.Forms.Grid.Grouping.GridTable.VisibleColumns_TotalWidthRequest(Object sender, CancelEventArgs e)
at Syncfusion.Windows.Forms.Grid.Grouping.GridVisibleColumnDescriptorCollection.OnTotalWidthRequest(CancelEventArgs e)
at Syncfusion.Windows.Forms.Grid.Grouping.GridVisibleColumnDescriptorCollection.get_TotalWidth()
at Syncfusion.Windows.Forms.Grid.Grouping.GridTable.GetHorizontalScrollWidth(Boolean isNested)
at Syncfusion.Windows.Forms.Grid.Grouping.GridTable.GetHorizontalScrollWidth()
at Syncfusion.Windows.Forms.Grid.Grouping.GridTable.get_LastColumnWidth()
at Syncfusion.Windows.Forms.Grid.Grouping.GridTableModel.OnQueryColWidth(GridRowColSizeEventArgs e)
at Syncfusion.Windows.Forms.Grid.GridModel.RaiseQueryColWidth(GridRowColSizeEventArgs e)
at Syncfusion.Windows.Forms.Grid.GridModelColWidthsIndexer.OnQuerySize(GridRowColSizeEventArgs e)
at Syncfusion.Windows.Forms.Grid.GridModelRowColSizeIndexer.GetSize(Int32 index)
at Syncfusion.Windows.Forms.Grid.GridModelRowColSizeIndexer.get_Item(Int32 index)
at Syncfusion.Windows.Forms.Grid.GridControlBase.GetColWidth(Int32 colIndex)
at Syncfusion.Windows.Forms.Grid.GridViewLayout.Initialize()
at Syncfusion.Windows.Forms.Grid.GridViewLayout.DemandInitialize()
at Syncfusion.Windows.Forms.Grid.GridViewLayout.get_LastVisibleRow()
at Syncfusion.Windows.Forms.Grid.GridControlBase.set_GridBounds(Rectangle value)
at Syncfusion.Windows.Forms.Grid.GridControlBase.DrawGrid(Graphics g, Rectangle bounds, Boolean drawCurrentCell, Boolean shouldClip)
at Syncfusion.Windows.Forms.Grid.Grouping.GridGroupingControl.OptimizeLoadTime()
at Syncfusion.Windows.Forms.Grid.Grouping.GridGroupingControl.f_Load(Object sender, EventArgs e)
at System.EventHandler.Invoke(Object sender, EventArgs e)
at System.Windows.Forms.Form.OnLoad(EventArgs e)
at System.Windows.Forms.Form.OnCreateControl()
at System.Windows.Forms.Control.CreateControl(Boolean fIgnoreVisible)
at System.Windows.Forms.Control.CreateControl()
at System.Windows.Forms.Control.WmShowWindow(Message& m)
at System.Windows.Forms.Control.WndProc(Message& m)
at System.Windows.Forms.ScrollableControl.WndProc(Message& m)
at System.Windows.Forms.ContainerControl.WndProc(Message& m)
at System.Windows.Forms.Form.WmShowWindow(Message& m)
at System.Windows.Forms.Form.WndProc(Message& m)
at System.Windows.Forms.ControlNativeWindow.OnMessage(Message& m)
at System.Windows.Forms.ControlNativeWindow.WndProc(Message& m)
at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntP


Since this is all in syncfusion code, i don''t know where to start.

It looks like this line causes the problem, but only when the grid has no entries:

gridSummaryRowDescriptor1.SummaryColumns.AddRange(new Syncfusion.Windows.Forms.Grid.Grouping.GridSummaryColumnDescriptor[] {
gridSummaryColumnDescriptor1});

Unfortunetly, any time I make changes using the designer, that line will be added back again. Is there any way to prevent this.

After some more investigation...

I have a SummaryRow defined in my base class. For some reason, every time i make changes in the designer, it will duplicate the SummaryRow in the inherited class. Not only does it dupplicate it, it will add the same entry every time I make a change in the designer.

I can fix it by deleting the SummaryRows in the inherited class, but I have to do this every time I make a change.