3 public class TestString
{
5 public static int Main() {
11 if (c
!= String
.Concat(b
, "a"))
13 if (!System
.Object
.ReferenceEquals(a
, b
))
15 if (System
.Object
.ReferenceEquals(c
, String
.Concat(b
, "a")))
17 if (!Object
.ReferenceEquals (String
.Empty
, ""))