访问C＃中非序列化类中包含的序列化对象

Question

I have a program code like this

namespace Ask{
    public class TestSerialize
    { 
        [Serializable]
        public struct position
        {
            public int x;
            public int y;
        }
    };


    public class SubTest:Panel
    {
        public TestSerialize.position pos;
    }

    public class Test
    {
        public static void main(String args[])
        {
            SubTest t=new SubTest();
            Console.WriteLine(t.pos.x);
        }
    }
}

now accessing pos.x in class test shows warning

Warning Accessing a member on 'Ask.SubTest.pos' may cause a runtime exception because it is a field of a marshal-by-reference class

I am weak with serialization concepts so please suggest how to mitigate this warning ? Is there a workaround or i need to redesign ? I dont want to catch an exception here.Anyway to avoid it ?

Answer 1

You have to change x and y of struct to public.

[Serializable]
public struct position
{
    public int x;
    public int y;
}

Answer 2

I think issue with struct members make them public. See my below program complete copy of your code. Only struct members are public and it compile fine without any warning.

public class Program
{
    public static void Main(string[] args)
    {
        SubTest t = new SubTest();
        Console.WriteLine(t.pos.x);
    }
}

public class TestSerialize
{
    [Serializable]
    public struct position
    {
        public int x;
        public int y;
    }
};


public class SubTest
{
    public TestSerialize.position pos;
}