public virtual Order AddMachines(params MachineryOnShift[] machs)
 {
     foreach (var m in machs)
     {
         if (IsNotRepeat(m.Name))
         {
             Machineries.Add(m);
         }
     }
     return(this);
 }
 private bool IsNotRepeat(string name)
 => Machineries.Where(x => x.Name == name).Any();