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I am using the extended datagrid. After applying filter on one record and delete it, I try to change the filter. I see the deleted in the filter list( I see this problem in your demo) and also by changing the filter this error appears "enumeration already
finished" (Note: only in my project : I'm using Observable collection as a data source)
Another problem is when I apply a filter on one column and then try to apply filter on another column,
I see this error " An unhandled exception ...." , also in your demo.
Thank you for your help.