title: MVC DataAnnotation Accept No Spaces
body: <p>I'm developing a Login View in MVC5.</p>
  
  <p>I would like to set at the ViewModel level a DataAnnotation to state the the field does NOT accept empty spaces.</p>
  
  <p>Is there a Data Annotation in MVC (something like [NoSpaces] that can be used to NOT allow a string field to contain "spaces" ?</p>