如何在父构造函数中为属性设置默认值？

Question

我有两个构造函数：

public abstract class A
{
    public A(int a,int b = 0 ) {}
} 

public class B : A
{
    public B(int a , int b):base(a,b) {} // I would like to didn't call again the attribute b 
       // because it's set to 0 in the parent class 
      //   public B(int a):base(a) {} 
}

也许我的问题很荒谬，但我正在寻找一个技巧来避免在父项中重复调用默认设置为 0 的属性 class，事实上，我有很多子项 classes

可以吗？

更新：

这是在 MainWindow 中创建的 B 实例：

B b1 = new B(1); // a = 1 and b = 0 by default 
B b2 = new B(2,1) // I would like to update the value b and set it to 1 for in the second instance created , In this case I got an error 
// B does not contains a constructor that takes 2 arguments ...

Answer 1

唯一的方法是重载 B:

中的构造函数

public class B : A
{
    public B(int a) : base(a) { }
    public B(int a, int b) : base(a, b) { }
}

如何在父构造函数中为属性设置默认值？

How can I set default value to an attribut in the parent constructor?

c#

oop

constructor