class Class A{public int a;}
struct Struct A{public int a;}
public static void ValueReference()
{
Class A c1=new Class A();
StructA s1=new StructA();
c1.a=5;
s1.a=c1.a;
ClassA c2=c1;
StructA s2=s1;
c1.a=8;
s1.a=c1.a+1;
Console.WriteLine(c1.a+" "+s1.a+" "+c2.a+" "+s2.a);