class A
{
public readonly int _X;
public A()
{
_X=3;
}
}
class B:A
{
public B()
{
//Init _X?
}
}
class A
{
public readonly int _X;
public A()
{
_X=3;
}
}
class B:A
{
public B()
{
//Init _X?
}
}
A多一个重载版本,可以传参的
class A
{
public readonly int _X;
public A(int x)
{
_X = x;
}
public A() { }
}
class B : A
{
public B(int x):base(x) { }
}
B b = new B(12);