//JAVA TO C# CONVERTER TODO TASK: Most Java annotations will not have direct .NET equivalent attributes: //ORIGINAL LINE: @Test void addRemoveAll() internal virtual void AddRemoveAll() { _set.addAll(1, 2, 3, 1, 2, 3, 100, 200, 300); assertEquals(6, _set.size()); assertTrue(_set.containsAll(100, 200, 300, 1, 2, 3)); _set.removeAll(1, 2, 100, 200); assertEquals(2, _set.size()); assertTrue(_set.containsAll(300, 3)); _set.removeAll(3, 300); assertEquals(0, _set.size()); }