title: How to make textbox readonly property false in code behind?
body: <p>I have one TextBox. I want to make textbox readonly property true or false during an event.</p>
  
  <p>I set the TextBox readonly property as true by the following code:</p>
  
  <pre><code>   txtNoOff.Attributes.Add("readonly", "readonly");
  </code></pre>
  
  <p>But how to make textbox readonly property false? I have tried like below:</p>
  
  <pre><code>   txtNoOff.Attributes.Add("readonly", "false");
  </code></pre>
  
  <p>But it does not work. How to achieve this? I need all ur suggestions please.</p>