Use more than one character to replace other
<p>I have a app and in this app it is possible with a function to replace some characters in a word with a other character</p>

<pre><code>var newCharacter = "H";

if (/*something happens here and than the currentCharacter will be replaced*/)
{
    // Replace the currentCharacter in the word with a random newCharacter.
    wordString = wordString.Replace(currentCharacter, newCharacter);
}
</code></pre>

<p>now all the characters will be replaced with the code above with the "H". But i want more letters so by example the H, E, A, S </p>

<p>what is the best way to do this?</p>

<p>When i do this:</p>

<pre><code>var newCharacter = "H" + "L" + "S";
</code></pre>

<p>it replaced the currentCharacter with H AND L AND S but i just want it to replace with H OR L OR S not all three </p>

<p>so if you have a word with HELLO and you want to replace the O with the newCharacter my output now is HELLHLS 
O -> HLS
but O needs to be -> H or L or S</p>
