Get all properties which implements a specific generic base type

I have a object which have generic collection properties of diffrent types like this.:

ObservableCollection<T>, BindingList<T>

Now i want to return all properties with implements ICollection<>

I tried this with no success, it seems this reflection query doesnt check the implemented interfaces

            IEnumerable<PropertyInfo> childCollections = typeof(T).GetProperties(BindingFlags.Public | BindingFlags.Instance)
                     .Where(p => p.PropertyType.IsGenericType && p.PropertyType.GetGenericTypeDefinition() == typeof(ICollection<>))
                     .Select(g => g);