c# equivalent for php @
<p>I need an equivalent of "@" in php for c#. here is example i want to do:</p>

<pre>
<code>
//in php
$str = @$_POST['x'].@$_POST['y'];


//in c#
string str = Request["x"]+Request["y"];

//if the given key is not exist it will break the code.

//also i dont want to use "try catch" because variables is many.

</code>
</pre>
