Apparent change (bug?) in MenuItemCollection.Clear()

[dpierson]

I have just converted one of my applications from .Net 1.1 / VS2003 to
..Net 2.0 / VS2005. I'm now seeing some different behavior in my app.
Here's a simple case description:

Form 1:
Stock form with MainMenu and one MenuItem (menuItem1) which has several
sub-MenuItems of its own.
IsMdiContainer = true.
Has a button (button1).

EVENTS:
private void Form1_Load(object sender, EventArgs e)
{
Form2 f = new Form2();
f.MdiParent = this;
f.Show();
}
private void button1_Click(object sender, EventArgs e)
{
while (menuItem1.MenuItems.Count 0)
{
menuItem1.MenuItems.RemoveAt(0);
}
// .Clear didn't work, so I also tried an "Iterative" approach
// this.menuItem1.MenuItems.Clear();
}

Form2:
Stock form with MainMenu and one MenuItem which has several
sub-MenuItems of its own.

Visual Studio 2003:
Run the program. Press the button. The menu clears out.

Visual Studio 2005:
Run the program. Press button. The menu does not clear out.

Is this a bug or is this intentional? Has anyone else seen this (and
do you know how to fix it?)

Note: .Clear DOES seem to work in non-mdi situations.