public DummyImmutableRef(long longProp, DummyImmutableRef refProp)
 {
     LongProp = longProp;
     RefProp  = refProp;
 }
 public DummyImmutableRef(string stringProp, long longProp, DummyImmutableRef refProp)
 {
     StringProp = stringProp;
     LongProp   = longProp;
     RefProp    = refProp;
 }
 public DummyImmutableRef(DummyImmutableRef refProp)
 {
     RefProp = refProp;
 }