Question

for example in this code:

void ButtonCreator()
{
    Button elboton = new Button();
}

what happens with elboton after I call this method?

Answer 1

If they’re not referenced by some other object (e.g. a container), then they become unreachable and are eligible for collection by the garbage collector. This is the same as creating any other object.

Note that the System.Windows.Forms.Control class (and its subclasses like Button) all implement the IDisposable interface, so the easiest way to make sure any unmanaged resources associated with the Button are released is to use a using block, like so:

using(Button elboton = new Button()) {
    // Do whatever you need to do
}
// elboton is now disposed

However, any managed resources associated with the object won’t be reclaimed until the GC runs, regardless of whether or not you use a using block.