Feature Request for Dropdown List

Radzen 3.5.2
VS version 16.10.1
Blazor Server App

We have a page that contains a radzen dropdown(multi-select) and a radzen grid. As you select items in the drop down it adds a row to the grid. On each grid row we have a template column that allows you to remove the item from the grid. Whenever we remove the grid row I'd also like to unselect the item in the dropdown. However I'm not able to because the data type for the bind value must be an Enumerable. List data type blows up. Can you either provide a TValue property to the dropdown or allow the bind-value to use a List?