public static VacationDescription ToModel(this VacationDescriptionDto model)
 {
     return(new VacationDescription()
     {
         Id = model.Id,
         Length = model.Length,
         Name = model.Name,
         Start = model.Start
     });
 }
 public static VacationDescriptionDto AttachUserSet(this VacationDescriptionDto model, int userSet)
 {
     if (userSet < 0)
     {
         model.UseLength = 0;
     }
     else if (userSet > model.Length)
     {
         model.UseLength = model.Length;
     }
     else
     {
         model.UseLength = userSet;
     }
     return(model);
 }