title: How to change the default error message of built-in ValidationAttributes?
body: <p>I would like to replace the default error message for for example <code>RequiredAttribute</code> or <code>RegularExpressionAttribute</code> with my own messages, so that I wouldn't need to specify the explicit <code>ErrorMessage</code> at attribute usage.</p>
  
  <p>EDIT: Last part of the sentence means that I'm aware of the ability to specify my own <code>ErrorMessage</code> at attribute usage, and I would like to avoid it for keeping the project DRY.</p>
  
  <p>Is it possible somehow? I haven't found any related property in the .NET library, and I currently have no idea how I could replace the .NET resources where the default messages are stored.</p>