Garbage Collector / ContextMenu / Dispose / General dotnet bug/issues?

[Daniel K.]

I've got a form with a usercontrol and a contextmenu for it. I put
everything together in the VS form designer. the codesnipped below is
from that dialog.

The problem: Before i added the cmObjektTree.Di spose() call in the
forms' dispose function, the garbage collector didn't collect my form
and everything on / related to it if i opened the contextmenu (and in
popup is no code that does anything else than setting the
visible/disabled states of menuitems). if i don't open it everything
is collected perfectly. i think it has something to do with the events
of the menuitems in the contextmenu. Seems that ContainerContro l calls
dispose on all the controls on it but it and its base classes don't
care about disposing the contextmenu?

In this special case i can solve the problem by calling the dispose
function of contextmens manually wherever i use one or create own base
classes derived by form and usercontrol that *do* care about disposing
the contextmenu but i'm not sure if there are more such problems and
there has to be a proper way to do things without wasting the
memory.... or not?
ps: i'd like to see the form classes' code to see what microsoft
exactly does e.g. in the dispose function of containercontro l and what
not.

-Codesnippet--------------------------------------------------------------------------
private void cmObjektTree_Po pup(object sender, System.EventArg s e)
{
cmiExpandCollap se.Text = objektTree.Acti veNodeExpanded ?
"&Reduziere n" : "E&rweitern ";
cmiExpandCollap se.Enabled = cmiExpandAll.En abled =
objektTree.Acti veNodeExpandabl e;
updateMenuState s();
}

protected override void Dispose( bool disposing )
{
cmObjektTree.Di spose(); // <== ********* I added this ***********

if(disposing && components != null)
components.Disp ose();
base.Dispose(di sposing);
}