WPF datagrid 'newitemplaceholderposition' is not allowed during a transaction begun by 'addnew'

Question

I have a tabControl on a WPF form.

In one of the Tab Items I have a User Control that contains a DataGrid which has CanUserAddRows="True". The

Answer 1

I had such a problem, but in my case the Grid was wrapped in an AdornerDecorator, removing it, everything worked