using System;
partial class Test
{
    int num1, num2, num3;
    public Test(int i, int j, int z)
    {
        num1 = i;
        num2 = j;
        num3 = z;
    }
    public static bool operator true(Test op)
    {
        if (op.num1 != 0 || op.num2 != 0 || op.num3 != 0)
        {
            return true;
        }
        else
        {
            return false;
        }
    }
     public static bool operator false(Test op)
    {
        if ((op.num1 == 0) && (op.num2 == 0) && (op.num3 == 0))
        {
            return true;   //为什么这里的true 换成 false 对结果一点都没有影响呢？
        }
        else
        {
            return false;  // 这里也是一样，换成 true 也没有影响结果？
        }
    }
     public static Test operator --(Test op)
     {
         op.num1--;
         op.num2--;
         op.num3--;
         return op;
     }
     public void show()
     {
         Console.WriteLine("{0} {1} {2}", num1, num2, num3);
     }
}
class me
{
    static void Main()
    {
        Test obj1 = new Test(10, 10, 10);
        while (obj1)
        {
            obj1.show();
            obj1--;
            //Console.WriteLine("obj1 is a ");
        }
    }
}

问题就在注释中还望指教谢谢