Should you use return or else? Which of these is optimal?
<p>Which of these is more optimal? Does it matter which one you use?</p>

<pre><code>If (condition is true)
{
    MessageBox.Show("bad data");
    return;
}

//mode code here 
</code></pre>

<p>or</p>

<pre><code>If (condition is true)
{
    MessageBox.Show("bad data"); 
}
else
{
    //mode code here
}
</code></pre>
