public void WeakReferenceGetsFreedButHashCodeRemainsConstant() {
var obj = new object();
var wrap = new WeakReferenceWrapper(obj);
int hashcode = wrap.GetHashCode();
obj = null;
GC.Collect();
GC.WaitForPendingFinalizers();
wrap.IsAlive.Should().Be.False();
wrap.Target.Should().Be.Null();
wrap.GetHashCode().Should().Be(hashcode);
}