Finding inherited object by ID - Entity Framework

Question

As you can see in the following image, I have a model with a base class "Person" and both entities "Kunde" and "Techniker" inherit the base class.

Now I've got following problem. When I try to use the method Find to get an object of the derived class Kunde with given ID, it tells me that OfType<TResult> is a method and isn't valid in this context.

public Kunde GetById(int id)
{
   return dbModel.PersonMenge.OfType<Kunde>.Find(id);
}

I've also tried to drop the OfType but it obviously tells me that the object Person cannot be implicitly converted to Kunde.

Is there anything I'm missing here?

Answer 1

It's just two parentheses:

OfType<Kunde>()

But then you can't use Find any more, because that is a method of DbSet. You have to use Single, or dbModel.PersonMenge.Find(id) as Kunde;.