title: RegEx equivalent for C# data annotation [DataType(DataType.Password)]
body: <p>I have an iOS native login that works with a custom API for a site with .Net's Identity. </p>
  
  <p>I need a regEx expression (for setting the password when signing up) that matches the requirements for the data annotation <code>[DataType(DataType.Password)]</code> in C#.</p>
  
  <p>Does anyone know where to look?</p>