PersonSpec4.cs

class Person 
{
  public long Id { get; set; }
  [MaxLength(50)]
  public string Name { get; set; }
}

class PersonViewModel
{
  ...
 
  public long Id { get; set; }
  /* 
  [MaxLength(50)] is applied implicitly or explicitly,
    statically or dynamically
  */
  public string Name { get; set; }
  
  public string GetCapitalizedName() { ... }
}