RouteValue, when i use a list in model RouteValue it doesn't parse the url correctly

[alhadi-cse]

issue in model.RouteValue,
when I use array or list in filter value (like: new RouteValueDictionary { { "selectedCountries", [3,5,7] } })

outcome: selectedCountries=3,5,7

but desired: selectedCountries=3&selectedCountries=5&selectedCountries=7

I think issue in here (page:PagingListOfT.cs, line: 75 -return dict.ToDictionary(kvp => kvp.Key, kvp => kvp.Value?.ToString());),
not considered kvp.Value as array/list.