title: simply regex date validation
body: <p>I'm trying to create simply regex validation for my mvc application. I tried:</p>
  
  <pre><code>[Required]
  [RegularExpression("(\\d\\d\\/\\d\\d\\/\\d\\d\\d\\d)")]
  </code></pre>
  
  <p>and it is not working. I want to force customer to enter date in format 01/01/2015</p>