using System;
public class Program
{
public static void Main()
Class1 c = new Class1();
}
public class Class1
public Struct1 struct1 {get; private set;}
public Class1()
Console.WriteLine(struct1.x);
struct1.modifySelf();
public struct Struct1
public int x;
public Struct1(int x)
this.x = x;
public void modifySelf()
this.x = 3;
Console.WriteLine(this.x);