Check if a List is of that type that it can ADD/Delete items ?

Question

Hello,

I am having a UserControl with an ItemsSource that allows only objects, that can be enumerated (implement IEnumerable) and where I can add/delete items. How can I test the latter?

Answer 1

Check the IsReadOnly property (by casting to IList or ICollection<T>)

Answer 2

Check for an implementation of the ICollection-interface, instead of IEnumerable. Usually any collection class that has collection manipulation possibilities, implements this interface, or a child.

Answer 3

You can check that the object is of type ICollection (generic) or IList (non-generic) and that their IsReadOnly property is not set to True