How to replace every char in a string value with the next char?
<p>If I have a string variable like this:</p>

<pre><code>string f = "ABC";
</code></pre>

<p>I want to make it like this:</p>

<pre><code>f="CDE"
</code></pre>

<p>This means that I want to take every char in this string and increase it to the next 2 values, if I have 'a' I want to change it to 'c' and so on.</p>
