DataGrid edition 'EditItem' is not allowed for this view` when bound to a WPF DataGrid

Question

I\'ve been reading about this at least for 4 hours, and seems to be the list type, but I have a situation:

A ObservableCollection that has a collection property.

Answer 1

Here is a generic Converter that I used

public class ObservableCollectionConverter: IValueConverter
{
    public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
    {
        var observableType= typeof (ObservableCollection<>).MakeGenericType(value.GetType().GetGenericArguments());
        return Activator.CreateInstance(observableType, value);
    }

    public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
    {
        var observableType = typeof(HashSet<>).MakeGenericType(value.GetType().GetGenericArguments());
        return Activator.CreateInstance(observableType, value);
    }
}