How to allow implicit conversion?
<p>Given some code like this:</p>

<pre><code>class Json
{
}

class Program
{
    static void Main(string[] args)
    {
    }

    Json MyAction()
    {
        return "{json:1}";
    }
}
</code></pre>

<p>Is there anything I can add to the <code>Json</code> class to make this compile? Something to let the compiler know that it can implicitly cast a string to a Json?</p>
