title: How to remove lowercase on a textbox?
body: <p>I'm trying to remove the lower case letters on a <code>TextBox</code>.. </p>
  
  <p>For example, short alpha code representing the insurance (e.g., 'BCBS' for 'Blue Cross Blue Shield'):</p>
  
  <pre><code>txtDesc.text = "Blue Cross Blue Shield";
  
  string Code = //This must be BCBS.. 
  </code></pre>
  
  <p>Is it possible? Please help me. Thanks!</p>