Base Class Doesn't Contain Parameterless Constructor?

Question

I\'m making my constructors a bit more strict by removing some of my empty constructors. I\'m pretty new to inheritance, and was perplexed with the error that I got: Base Class

Answer 1

If your base class doesn't have a parameterless constructor, you need to call one from your derived class using base keyword:

class A
{
    public A(Foo bar)
    {
    }
}

class A2 : A
{
    public A2()
        : base(new Foo())
    {
    }
}