public void GivenCollection_WhenRemovingAll_ThenNumberIsZeroAndDoesNotContain(int initialCount)
{
// Arrange
_tags.AddMany <string>(initialCount);
// Act
_tags.RemoveAll <string>();
// Assert
Assert.That(_tags.GetCount <string>(), Is.EqualTo(0));
Assert.That(_tags.Contains <string>(), Is.False);
}