In my add-in I have a method that unsubcribes from delete event
handler(it was previously subscribed to) in the begining and subscribes
to it again at the end like:

public void SynchronizeTasks(...)
{
tasksItems.ItemRemove -= OnTasksDelete;

....
foreach (Outlook.TaskItem task in tasksItems)
{
task.Delete();
}
....

tasksItems.ItemRemove += new
Outlook.ItemsEvents_ItemRemoveEventHandler(OnTasks Delete);
}

However, for every task deleted in this method I catch an ItemRemove
event in OnTasksDelete. Is there any way to completely unsubscribe from
this event?

Thanks in advance.