What is more performant when using string.Format with many args: string or StringBuilder?
<p>Does using <code>string.Format</code> like this:</p>

<pre><code>string.Format(txt, arg0, arg1, arg2, arg3, arg4,...)
</code></pre>

<p>is the same as saying <code>txt+=args;</code> thus it creates new object every time it append a new string from the args list? and better using <code>StringBuilder.Format</code> ?</p>