Missing directory reference in List<>

private MultiSelectList GetCountries(string[] selectedValues)

List<Country> Countries = new List<Country>()

new Country() { ID = 1, Name= "United States" },

new Country() { ID = 2, Name= "Canada" },

new Country() { ID = 3, Name= "UK" },

new Country() { ID = 4, Name= "China" },

new Country() { ID = 5, Name= "Japan" }

return new MultiSelectList(Countries, "ID", "Name", selectedValues);