anchor.diff:  #else
       RegexOptions.Compiled
   #endif
  +  // note on the regex we have /Date()/ and not \/Date()\/ because the \/ escaping 
  +  // is already taken care of before AsDateTime is called
     let msDateRegex = lazy (new Regex(@"^/Date\((-?\d+)(?:-\d+)?\)/$", regexOptions))
   
   type Operations = 
  
positive.code:     match opt with 
      | Some v -> Nullable v
      | _ -> Nullable()
      
negative.code:   static member AsOption str =
      if String.IsNullOrWhiteSpace str then None else Some str
  
    /// Parse date time using either the JSON milliseconds format or using ISO 8601
    /// that is, either "\/Date(<msec-since-1/1/1970>)\/" or something
    /// along the lines of "2013-01-28T00:37Z"
    static member AsDateTime culture (text:string) =
      // Try parse "Date(<msec>)" style format
  