[DotGNU]inheritance problem

[Neil Cawse]

using System;

public class Test

{

 private class Test1
 {
  public string unique;
  public Test1()
  {
   unique = "Test1";
  }
 }

 private class Test2 : Test1
 { }

 public static void Main()
 {
  Test2 test2 = new Test2();
  Console.WriteLine(test2.unique);
 }

}

 

Produces blank line in portable.net

and test1 in ms.net

not sure why??