帮给下列解除一下流程。
namespace ConsoleApplication2
{
    class Program
    {
        struct point

        {
            public int x, y;
            public point(int x, int y)

            {
                this.x = x;
                this.y = y;

            }
       }

        static void Main(string[] args)
        {
            point a = new point(10, 0);
            point b =a;
            a.x = 100;
            System.Console.WriteLine(b.x);
            System.Console.ReadKey();
        }
    }
}