8、结构的构造器应该显式调用！！！（坑）

public class ShouldExplicitCall
{
    public struct Point
    {
        public int a;
        public Point()
        {
            a=1;
        }
    }
    public Point should = new Point();
    public Point not;
    public void Out()
    {
        Console.WriteLine(not.a);//0
        Console.WriteLine(should.a);//1
    }
}