<p>I saw this signature on the ListView class:</p>

<pre><code>public ListView..::.ListViewItemCollection Items { get; }
</code></pre>

<p>When I saw that, "What?!"</p>

<p>I searched "dot dot colon colon dot" and "..::." on Google with no result.</p>

<p><img src="https://i.stack.imgur.com/av0FO.png" alt="alt text"></p>

That's not C#; that's JScript. In C#, it would be:
public ListView.ListViewItemCollection Items { get; }
It's a little different because ListViewItemCollection is an inner class of ListView.
I'm guessing that you saw this looking at
ListView.Items Property (System.Windows.Forms)
.
If you look at the listing for all the other languages, they're all listed with the JScript syntax. You've found a documentation bug.