using System;

public class Program

{

    public static void Main()

    {

        var s1 = new MyStruct(10);

        var s2 = new MyStruct(20);

        var myClass = new MyClass();

        myClass.propertyStruct = s1;

        myClass.fieldStruct = s2;

        myClass.propertyStruct.ChangeMe(30);

        myClass.fieldStruct.ChangeMe(40);

        myClass.propertyStruct.WriteMe();

        myClass.fieldStruct.WriteMe();

    }

}

​

public class MyClass {

​

    public MyStruct propertyStruct {get;set;}

    public MyStruct fieldStruct;

}

​

public struct MyStruct {

    private int internalValue;

    public MyStruct(int x) {

        this.internalValue = x;

    }

    public void ChangeMe(int x) {

        this.internalValue = x;

    }

    public void WriteMe() {

        Console.WriteLine(internalValue);

    }

}