求高手告诉我运行原因
using System;
class A
{
public A()
{
PrintFields();
}
public virtual void PrintFields(){}
}
class B:A
{
int x=1;
int y;
public B()
{
y=-1;
}
public override void PrintFields()
{
Console.WriteLine("x={0},y={1}",x,y);
}
我试过了答案是x=1，y=0；

[解决办法]