silverlight crashes as datagrid in edit loses focus

so the goes something like this: I have two datagrids for editing data. One edits an array of strings, and the second edits an array of objects that contain multiple data fields (so, a matrix of some sort, essentially).

For some reason, when I click on the first datagrid (for array of strings) to edit a particular cell, if I click somewhere else outside the datagrid (say, a button outside) to exit edit, the interface hangs, and then Chrome (or IE) crashes. Even when I run the app in debug mode in VS, no errors were thrown.

Does anyone know how to hunt this bug down?

in MainPage.xaml:

<sdk:DataGrid AutoGenerateColumns="True" Canvas.Left="14" Canvas.Top="88" Height="165" Name="ObjectsGrid" Width="196" KeyDown="ObjectsGrid_KeyDown" CellEditEnding="ObjectsGrid_CellEditEnding">

in MainPage.xaml.cs:

private void ObjectsGrid_KeyDown(object sender, KeyEventArgs e)
    {
        if (e.Key == Key.Delete)
        {
            if (ObjectsGrid.SelectedItem != null)
            {
                ArrayOfString s = (ArrayOfString)ObjectsGrid.ItemsSource;
                s.Remove((String)ObjectsGrid.SelectedItem);
                ObjectsGrid.ItemsSource = n开发者_运维百科ull;
                ObjectsGrid.ItemsSource = s;
            }
        }
    }

private void ObjectsGrid_CellEditEnding(object sender, DataGridCellEditEndingEventArgs e)
    {
        DataGrid tGrid = (DataGrid)sender;
        String c = ((TextBox)e.EditingElement).Text;

        HashtableCollection[_currentCorrespondingItem].DataBoundObject[tGrid.SelectedIndex] = c;
    }

and this is failing.

Does it get to the HitsGrid_CellEditending? If so, place a bracket at the { before "DataGrid tGrid" and keep pressing F11 untill you get to a error. If you get to any. If no error raises I can only assume the action you are performing in HintsGrid_CellEditEnding clears your datagrid or even application.