pragmatically which character use to split the string
<p>I have a string like this:  "10+2 "       </p>

<pre><code>         char[] a = new char[] { '+', '-' };     
         string[] un = txtdiscout.Text.ToString().Split(a);   
         string str1 = un[0];  //value show 10 
         string str2 = un[1];  //value show 2  
</code></pre>

<p>Basically, I can clearly see and  understand that the string is split by '+' character.<br>
Is there a way to determine which character is used to split the string?    </p>
