public void Classes_are_passed_by_reference()
{
var s = new SomeClass(1, 2);
Modify(s);
Assert.AreEqual(123, s.X);
Assert.AreEqual(2, s.Y);
}
public void Passing_a_reference_type_as_ref_allows_the_method_to_change_the_actual_reference_and_not_just_the_referenced_object()
{
var s1 = new SomeClass(1, 2);
var s2 = s1;
Assert.AreSame(s1, s2);
// DON'T DO THIS!
ReferenceAnotherObject(ref s1);
Assert.AreNotSame(s1, s2);
}
private void Modify(SomeClass s)
{
// These changes do actually affect the original value
s.X = 123;
}
private void ReferenceAnotherObject(ref SomeClass s)
{
s = new SomeClass(4, 5);
}