Question

Func<vw_UsuarioPerfilAtributo, bool> expressionPerfil = Perf =>
  foreach(int _key in Keys){
    Perf.Id == _key ||
  }

(I need multiple OR ||)

I think this is faster than

    List<vw_UsuarioPerfilAtributo> teste = new List<vw_UsuarioPerfilAtributo>();
    teste.add(context.Find(Id));

Possible?

Answer 1

Maybe you need something like:

//use a method because use a foreach in a lambda expression isn't allowed
public bool myFunction(vw_UsuarioPerfilAtributo Perf){
   foreach(int _key in Keys){
        if(Perf.Id == _key || /*other condition here*/)
           return true;
   }

   return false;
}

And:

Func<vw_UsuarioPerfilAtributo, bool> expressionPerfil = Perf => myFunction(Perf);

Or just:

Func<vw_UsuarioPerfilAtributo, bool> expressionPerfil = Perf => Keys.Any(_key => Perf.Id == _key || /*other condition here*/);

---

I think this is faster than

teste.add(context.Find(Id));

In this case context.Find(id) (where context is a List<>) returns the found element while the previous code returns a boolean because of Func<vw_UsuarioPerfilAtributo, bool>