class A
{
public int i = 10;
public string j = "12345";
public A Copy(A a)
{
a.i = 20;
a.j = "54321";
return a;
}
}
class AAAA
{
static void Main(string[] args)
{
A a = new A();
A b = new A();
b = b.Copy(a);
Console.WriteLine(b.Equals(a));
Console.WriteLine(b.i);
Console.WriteLine(b.j);