title: How to block or restrict special characters from textbox
body: <p>I need exclude special characters (<code>%,&amp;,/,",'</code> etc ) from textbox </p>
  
  <p>Is it possible? Should I use key_press event?</p>
  
  <pre><code>string one = radTextBoxControl1.Text.Replace("/", "");
                  string two = one.Replace("%", "");
                  //more string
                  radTextBoxControl1.Text = two;
  </code></pre>
  
  <p>in this mode is very very long =(</p>