i want something like
var o = db.Persons.Where(x=>x.Id in (1, 2));
or
var o = db.Persons.Where(x=>x.Id =any (1, 2));
var o = db.Persons.Where(x=> new[]{1, 2}.Contains(x.Id));
var keys = new List<int>{1,2,3}; //This contains the collection of your Id var o = db.Persons.Where(x=>keys.Contains(x.Id));