Garbage Collection should have removed object but WeakReference.IsAlive still returning true

Question

I have a test that I expected to pass but the behavior of the Garbage Collector is not as I presumed:

[Test]
public void WeakReferenceTest2()
{
    var obj =         


        

Answer 1

As far as I know, calling Collect does not guarantee that all resources are released. You are merely making a suggestion to the garbage collector.

You could try to force it to block until all objects are released by doing this:

GC.Collect(2, GCCollectionMode.Forced, true);

I expect that this might not work absolutely 100% of the time. In general, I would avoid writing any code that depends on observing the garbage collector, it is not really designed to be used in this way.