title: ReadOnly Attribute in MVC 4
body: <p>While the toot-tip says,</p>
  
  <p><img src="https://i.stack.imgur.com/u9fq5.jpg" alt="enter image description here"></p>
  
  <p>I tried using it but could not make it to work. I am not sure how it works and about its functionality. 
  So what purpose does this built-in attribute <code>ReadOnly</code>serve?</p>
  
  <p>Any inputs will be appreciated. Thank you.</p>