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I am using WPF(.net 4) datagrid.my datagrid binded to Entity object and user can Remove a Row By Del Key.

i save the data into data base after user delete a row(savechange() methode).my problem is when the savechange() method return error.

I need to recover Deleted Row into Data Grid after error showed.Removed Item is not in datagrid.Items but is in dataGrid.ItemSource!!!!!!!.

i used the Items.Insert(index,Item) method but returned Error("Operation is not valid while ItemsSource is in use. Access and modify elements with ItemsControl.ItemsSource instead." How can I do that?

Is there any straight way?
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