Why can't we use a constructor with parameter in derived classes

Question

Why is this not possible? I get the following compiler-error when instantiating \"DerivedClass\" with a constructor-parameter:

\'GenericParameterizedConstructor.Deri

Answer 1

The deriving class needs to expose the constructor

public class DerivedClass : BaseClass
{
    public DerivedClass(string str) :base(str) {}
}