Permanently cast derived class to base

Question

Class A { }
Class B : A { }

B ItemB = new B();
A ItemA = (A)B;

Console.WriteLine(ItemA.GetType().FullName);

Is it possible to do something like a

Answer 1

(this is probably obvious, but...)

re: the accepted answer by @Ani:

If you still want to do this; you could write a method that manually constructs an A from a B by newing up an A and then copying data over. This might exist as a ToA() instance-method on B.

Or use Automapper to copy the data back:

Mapper.CreateMap();
// ...later...
var wipedInstance = Mapper.Map(instanceOfChildClass);

then wipedInstance.GetType() would be typeof(BaseClass)