public void Writes_to_original_are_not_visible_to_clones()
{
var items = new CopyOnWriteList <string>();
items.Add("test");
Assert.Equal("test", items[0]);
var clone = items.Clone();
var clone2 = items.Clone();
Assert.True(items.HasSameBacking(clone));
Assert.True(items.HasSameBacking(clone2));
items[0] = "no";
Assert.False(items.HasSameBacking(clone));
Assert.False(items.HasSameBacking(clone2));
Assert.True(clone.HasSameBacking(clone2));
Assert.Equal("test", clone[0]);
Assert.Equal("test", clone2[0]);
}