where not in () statement with lambda

Question

Does anyone any idea how can we use where not in() statement with lambda?

this is where id in() statement

public List<abc> GetList(List<string> ID)
{
return db.abcs.Where(a => ID.Contains(a.id)).ToList<abc>();
}

I'd like to find how cloud it be opposite. "where id not in..."

Answer 1

Simply add a not (!) operator:

// Not In
return db.abcs.Where(a => !ID.Contains(a.id)).ToList();

Answer 2

Why not ?

return db.abcs.Where(a => ! ID.Contains(a.id)).ToList<abc>();