public void Copy()
{
SecurityElement se = SecurityElement.FromString("<tag attribute=\"value\"><child attr=\"1\">mono</child><child/></tag>");
SecurityElement copy = se.Copy();
Assert.IsFalse(Object.ReferenceEquals(se, copy), "se!ReferenceEquals");
Assert.IsTrue(Object.ReferenceEquals(se.Children [0], copy.Children [0]), "c1=ReferenceEquals");
Assert.IsTrue(Object.ReferenceEquals(se.Children [1], copy.Children [1]), "c2=ReferenceEquals");
}
