title: Can I determine if a KeyEventArg is an letter or number?
body: <p>Is there a way to determine if a key is letter/number (<code>A-Z</code>,<code>0-9</code>) in the <code>KeyEventArgs</code>? Or do I have to make it myself? I found a way with <a href="http://bytes.com/topic/net/answers/598606-c-keyeventargs-how-quickly-determine-if-letter-number-presse" rel="noreferrer">e.KeyCode</a>, is that accurate?</p>
  
  <pre><code>if(((e.KeyCode &gt;= Keys.A       &amp;&amp; e.KeyCode &lt;= Keys.Z )
   || (e.KeyCode &gt;= Keys.D0      &amp;&amp; e.KeyCode &lt;= Keys.D9 )
   || (e.KeyCode &gt;= Keys.NumPad0 &amp;&amp; e.KeyCode &lt;= Keys.NumPad9))
  </code></pre>