Is there a shortcut way to create a new object if an object is null? : <p>I have some simple code:</p>

<pre><code>    public static void InitializeScreenTimeStopwatch()
    {
        if (ScreenTimeStopwatch == null)
            ScreenTimeStopwatch = new Stopwatch();
    }
</code></pre>

<p>Is there a simple way that this code can be refactored using the ? operator that's now with the latest version of C#</p>
