How to handle nullable string as a function parameter
<p>I have function with parameters as given below.</p>

<pre><code>public void myfunction(int a, string b){}
</code></pre>

<p>Can we call this function by passing only first parameter and second parameter is optional(nullable string)?</p>

<pre><code>myfunction(5);
</code></pre>

<p>If yes then how.</p>