I am trying to handle the ItemAdd event on a number of folders under my default mailbox in Outlook.

I find the Event fires for a while and then stops. Can anyone help explain why?



The following code is in from a VSTO SE AddIn.

1) I find a folder which I will handle the AddItem event for.

2) Call SetEventHandler which registers the event handler

3) Adds the a folder to a class level collection of folders

(Step 3 is to try an ensure the folder doesn't drop out of scope and get garbage collected)

4) Call SetEventHandler for each sub folder





private static SortedDictionaryString, Outlook.MAPIFolder m_ItemAddHandled

= new SortedDictionarystring, Outlook.MAPIFolder();



private void ThisAddIn_Startup(object sender, System.EventArgs e)

{

Outlook.MAPIFolder myRootFolder = FindFolder(...);

if (colligoRootFolder != null)

{

SetEventHandler(myRootFolder);

}

}



private void SetEventHandler(Outlook.MAPIFolder parent)

{

System.Diagnostics.Debug.Print("SetEventHandler(" + parent.FullFolderPath + ")");



parent.Items.ItemAdd += new Outlook.ItemsEvents_ItemAddEventHandler(Items_Item Add);

m_ItemAddHandled.Add(parent.FullFolderPath, parent);



foreach (Outlook.MAPIFolder folder in parent.Folders)

{

SetEventHandler(folder);

}

}



void Items_ItemAdd(object Item)

{

MessageBox.Show("Items_ItemAdd");

}