Question

Does anyone know what is the behavior for C#? Is it the same for all .NET languages?

Answer 1

Yes – this happens with any constructor in the derived class if you don’t explicitly call a base class constructor.

class Base {   Base(){}   Base(int i){} }  class Derived : Base {   Derived(bool x) {} // calls Base.Base() }  class Derived2 : Base {   Derived2() : base(10) {} // calls Base.Base(int) }